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Author: Tinku Tara

The-sixth-term-of-an-AP-is-2-and-its-common-difference-is-greater-than-one-The-value-of-the-common-difference-of-the-progression-so-that-the-product-of-the-first-fourth-and-fifth-terms-is-greatest-

Question Number 16451 by myaoo last updated on 22/Jun/17 $$\mathrm{The}\:\mathrm{sixth}\:\mathrm{term}\:\mathrm{of}\:\mathrm{an}\:\mathrm{AP}\:\mathrm{is}\:\mathrm{2},\:\mathrm{and}\:\mathrm{its} \\ $$$$\mathrm{common}\:\mathrm{difference}\:\mathrm{is}\:\mathrm{greater}\:\mathrm{than}\:\mathrm{one}. \\ $$$$\mathrm{The}\:\mathrm{value}\:\mathrm{of}\:\mathrm{the}\:\mathrm{common}\:\mathrm{difference}\:\mathrm{of} \\ $$$$\mathrm{the}\:\mathrm{progression}\:\mathrm{so}\:\mathrm{that}\:\mathrm{the}\:\mathrm{product}\:\mathrm{of}\:\mathrm{the} \\ $$$$\mathrm{first},\:\mathrm{fourth}\:\mathrm{and}\:\mathrm{fifth}\:\mathrm{terms}\:\mathrm{is}\:\mathrm{greatest}\:\mathrm{is} \\ $$ Terms of Service Privacy Policy…

3-cubes-of-metal-whose-edges-are-3-4-and-5-respectively-are-melted-and-formed-into-a-single-cube-If-there-be-no-loss-of-metal-in-the-process-find-the-side-of-the-new-cube-

Question Number 16419 by Mr easymsn last updated on 21/Jun/17 $$\mathrm{3}\:\mathrm{cubes}\:\mathrm{of}\:\mathrm{metal}\:\mathrm{whose}\:\mathrm{edges}\:\mathrm{are}\:\mathrm{3},\mathrm{4} \\ $$$$\mathrm{and}\:\mathrm{5}\:\mathrm{respectively}\:\mathrm{are}\:\mathrm{melted}\:\mathrm{and} \\ $$$$\mathrm{formed}\:\mathrm{into}\:\mathrm{a}\:\mathrm{single}\:\mathrm{cube}.\:\mathrm{If}\:\mathrm{there}\:\mathrm{be} \\ $$$$\mathrm{no}\:\mathrm{loss}\:\mathrm{of}\:\mathrm{metal}\:\mathrm{in}\:\mathrm{the}\:\mathrm{process}\:\mathrm{find} \\ $$$$\mathrm{the}\:\mathrm{side}\:\mathrm{of}\:\mathrm{the}\:\mathrm{new}\:\mathrm{cube}. \\ $$ Answered by Tinkutara last…

A-solid-sphere-of-radius-4-cm-is-melted-and-recast-into-n-solid-hemispheres-of-radius-2-cm-each-Find-n-

Question Number 16418 by Mr easymsn last updated on 21/Jun/17 $$\mathrm{A}\:\mathrm{solid}\:\mathrm{sphere}\:\mathrm{of}\:\mathrm{radius}\:\mathrm{4}\:\mathrm{cm}\:\mathrm{is}\:\mathrm{melted} \\ $$$$\mathrm{and}\:\mathrm{recast}\:\mathrm{into}\:'{n}'\:\mathrm{solid}\:\mathrm{hemispheres}\:\mathrm{of} \\ $$$$\mathrm{radius}\:\mathrm{2}\:\mathrm{cm}\:\mathrm{each}.\:\mathrm{Find}\:{n}. \\ $$ Answered by Tinkutara last updated on 22/Jun/17 $$\mathrm{Volume}\:\mathrm{of}\:\mathrm{solid}\:\mathrm{sphere}\:=\:\mathrm{Volume}\:\mathrm{of}\:{n}…

3-integers-are-chosen-at-random-from-the-first-20-integers-The-probability-that-their-ptoduct-is-even-is-

Question Number 81926 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{3}\:\mathrm{integers}\:\mathrm{are}\:\mathrm{chosen}\:\mathrm{at}\:\mathrm{random}\:\mathrm{from} \\ $$$$\mathrm{the}\:\mathrm{first}\:\mathrm{20}\:\mathrm{integers}.\:\mathrm{The}\:\mathrm{probability} \\ $$$$\mathrm{that}\:\mathrm{their}\:\mathrm{ptoduct}\:\mathrm{is}\:\mathrm{even},\:\mathrm{is} \\ $$ Commented by mr W last updated on 16/Feb/20…

One-man-adds-3-litres-of-water-to-12-litres-of-milk-and-another-4-litres-of-water-to-10-litres-of-milk-What-is-the-ratio-of-the-strengths-of-milk-in-the-two-mixtures-

Question Number 81927 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{One}\:\mathrm{man}\:\mathrm{adds}\:\mathrm{3}\:\mathrm{litres}\:\mathrm{of}\:\mathrm{water}\:\mathrm{to}\:\mathrm{12}\:\mathrm{litres}\:\mathrm{of}\:\mathrm{milk} \\ $$$$\mathrm{and}\:\mathrm{another}\:\mathrm{4}\:\mathrm{litres}\:\mathrm{of}\:\mathrm{water}\:\mathrm{to}\:\mathrm{10}\:\mathrm{litres}\:\mathrm{of}\:\mathrm{milk}. \\ $$$$\mathrm{What}\:\mathrm{is}\:\mathrm{the}\:\mathrm{ratio}\:\mathrm{of}\:\mathrm{the}\:\mathrm{strengths}\:\mathrm{of}\:\mathrm{milk}\:\mathrm{in}\:\mathrm{the} \\ $$$$\mathrm{two}\:\mathrm{mixtures}? \\ $$ Answered by TANMAY PANACEA last updated…

If-A-and-B-are-two-indpendent-events-the-probability-that-both-A-and-B-occur-is-1-8-and-the-probability-that-neither-of-them-occurs-is-3-8-The-probability-of-the-occurrence-of-A-is-

Question Number 81925 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{If}\:{A}\:\mathrm{and}\:{B}\:\mathrm{are}\:\mathrm{two}\:\mathrm{indpendent}\:\mathrm{events}, \\ $$$$\mathrm{the}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{both}\:{A}\:\mathrm{and}\:{B}\:\mathrm{occur} \\ $$$$\mathrm{is}\:\frac{\mathrm{1}}{\mathrm{8}}\:\mathrm{and}\:\mathrm{the}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{neither}\:\mathrm{of} \\ $$$$\mathrm{them}\:\mathrm{occurs}\:\mathrm{is}\:\frac{\mathrm{3}}{\mathrm{8}}\:.\:\mathrm{The}\:\mathrm{probability}\:\mathrm{of}\:\mathrm{the} \\ $$$$\mathrm{occurrence}\:\mathrm{of}\:{A}\:\mathrm{is} \\ $$ Answered by MJS last…

If-P-Q-R-2-3-4-and-P-2-Q-2-R-2-11600-then-find-P-Q-R-

Question Number 16383 by aamaguestt last updated on 21/Jun/17 $$\mathrm{If}\:\mathrm{P}\::\:\mathrm{Q}\::\:\mathrm{R}\:=\:\mathrm{2}\::\:\mathrm{3}\::\:\mathrm{4}\:\mathrm{and}\:\mathrm{P}^{\mathrm{2}} +\mathrm{Q}^{\mathrm{2}} +\mathrm{R}^{\mathrm{2}} =\mathrm{11600}, \\ $$$$\mathrm{then}\:\mathrm{find}\:\left(\mathrm{P}+\mathrm{Q}−\mathrm{R}\right). \\ $$ Answered by ajfour last updated on 21/Jun/17 $$\:{p}^{\mathrm{2}}…

The-value-of-determinant-determinant-1-1-1-1-1-1-1-1-1-is-equal-to-

Question Number 81879 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{The}\:\mathrm{value}\:\mathrm{of}\:\mathrm{determinant}\begin{vmatrix}{−\mathrm{1}}&{\:\:\:\:\mathrm{1}}&{\:\:\:\:\mathrm{1}}\\{\:\:\:\:\mathrm{1}}&{−\mathrm{1}}&{\:\:\:\:\mathrm{1}}\\{\:\:\:\:\mathrm{1}}&{\:\:\:\:\:\mathrm{1}}&{−\mathrm{1}}\end{vmatrix} \\ $$$$\mathrm{is}\:\mathrm{equal}\:\mathrm{to} \\ $$ Commented by john santu last updated on 16/Feb/20 $$−\mathrm{1}\left(\mathrm{0}\right)−\mathrm{1}\left(−\mathrm{2}\right)+\mathrm{1}\left(\mathrm{2}\right)\:=\:\mathrm{4} \\…

The-system-of-linear-equations-x-y-z-2-2x-y-z-3-3x-2y-kz-4-has-a-unique-solution-if-

Question Number 81876 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{The}\:\mathrm{system}\:\mathrm{of}\:\mathrm{linear}\:\mathrm{equations}\:{x}+{y}+{z}=\mathrm{2}, \\ $$$$\mathrm{2}{x}+{y}−{z}=\mathrm{3},\:\mathrm{3}{x}+\mathrm{2}{y}+{kz}=\mathrm{4}\:\mathrm{has}\:\mathrm{a}\:\mathrm{unique} \\ $$$$\mathrm{solution}\:\mathrm{if} \\ $$ Commented by Tony Lin last updated on 16/Feb/20…

If-A-1-5-7-0-7-9-11-8-9-then-trace-of-matrix-A-is-

Question Number 81874 by zainal tanjung last updated on 16/Feb/20 $$\mathrm{If}\:{A}=\begin{bmatrix}{\:\:\mathrm{1}}&{−\mathrm{5}}&{\:\:\:\mathrm{7}}\\{\:\:\mathrm{0}}&{\:\:\:\:\mathrm{7}}&{\:\:\:\mathrm{9}}\\{\mathrm{11}}&{\:\:\:\:\mathrm{8}}&{\:\:\:\mathrm{9}}\end{bmatrix}\:\mathrm{then}\:\mathrm{trace}\:\mathrm{of}\: \\ $$$$\mathrm{matrix}\:{A}\:\mathrm{is} \\ $$ Commented by jagoll last updated on 16/Feb/20 $${trc}\:\left({A}\right)=\mathrm{17} \\ $$…