Math Question and Answers


Question and Answers Forum

All Questions Topic List
Algebra Questions
Previous in All Question Next in All Question
Previous in Algebra Next in Algebra
Question Number 95232 by bobhans last updated on 24/May/20

Commented by bobhans last updated on 24/May/20

$i want compare with my answer$
Commented by bobhans last updated on 24/May/20

$the choice answer ?$ $(a) 5 day (b) 8 day$ $(c) 10 day (d) 12 day$
Commented by PRITHWISH SEN 2 last updated on 24/May/20

$6 m + 8 w = 15 \Rightarrow 90 m + 120 w = 1 \Rightarrow 9 m + 12 w = 10$ $Ans - 10 days$
Commented by Farruxjano last updated on 24/May/20

$A n s : C$
Commented by mr W last updated on 24/May/20

$10 d a y s i s c o r r e c t .$ $i f w e {d o n}^{'} t u s e m a t h . e q n . b u t o n l y$ $h u m a n l o g i c, w e k n o w t h e a n s w e r$ $q u i c k l y :$ $w i t h 9 m e n a n d 12 w o m e n, w e h a v e$ $\frac{3}{2} a s m u c h p o w e r a s w i t h 6 m e n a n d$ $8 w o m e n, t h e r e f o r e w e n e e d o n l y \frac{2}{3}$ $a s m u c h t i m e a s b e f o r e . i f w e n e e d$ $15 d a y s b e f o r e, t h e n w e n e e d o n l y$ $10 d a y s n o w .$ $i f w e d o u b l e t h e p o w e r, i . e . w i t h$ $12 m e n a n d 16 w o m e n, t h e n w e n e e d o n l y$ $h a l f o f t h e t i m e a s b e f o r e, i . e . 7.5 d a y s .$ $i f w e w a n t t o d o t h e j o b i n o n l y 5 d a y s,$ $w e m u s t h a v e t r i p l e p o w e r a s b e f o r e,$ $i . e . w e n e e d 18 m e n a n d 24 w o m e n .$
Commented by bobhans last updated on 24/May/20

$alright$
	Answered by Farruxjano last updated on 24/May/20

	$D o y o u h a v e a n y p r o b l e m e l s e ?$
	Commented by bobhans last updated on 24/May/20

	$do you mean the same type ?$
	Answered by Farruxjano last updated on 24/May/20

	$L e t : t h e s p e e d o f m e n i s - v_{1} a n d t h e$ $w o m a n - v_{2} a n d t h e w o r k - S . S o, w e g e t :$ $(6 v_{1} + 8 v_{2}) \cdot 15 = S \Rightarrow w e m u s t f i n d : A = \frac{S}{9 v_{1} + 12 v_{2}} = ?$ $(6 v_{1} + 8 v_{2}) \cdot 15 = S \Rightarrow (3 v_{1} + 4 v_{2}) \cdot 30 = S \Rightarrow$ $\Rightarrow 3 v_{1} + 4 v_{2} = \frac{S}{30} ∣ \times 3 \Rightarrow 9 v_{1} + 12 v_{2} = \frac{S}{10} \Rightarrow$ $\Rightarrow A = \frac{S}{9 v_{1} + 12 v_{2}} = \frac{S}{\frac{S}{10}} = 10 d a y s .$ $I {d o n}^{'} t k n o w E n g l i s h p e r f e c t s o$ $I a p o l o g i s e$
	Answered by mr W last updated on 24/May/20

	$s a y a m a n c a n d o m t h i n g s e a c h d a y,$ $a n d a w o m a n c a n d o w t h i n g s e a c h d a y .$ $f o r t h e j o b t o t a l l y t h e r e a r e s t h i n g s$ $t o d o .$ $6 m e n a n d 9 w o m e n n e e d 15 d a y s, i . e .$ $(6 m + 8 w) 15 = s . . . (i)$ $s a y 9 m e n a n d 12 w o m e n n e e d x d a y s, i . e .$ $(9 m + 12 w) x = s . . . (i i)$ $(i i) / (i) :$ $\frac{3 x}{2 \times 15} = 1$ $\Rightarrow x = 10 d a y s$
Terms of Service
Privacy Policy
Contact: info@tinkutara.com

Question and Answers Forum