A-sum-of-2800-is-invested-partly-at-5-and-partly-at-4-If-the-total-income-is-128-per-annum-find-the-amount-invested-at-5-

Question Number 203825 by necx122 last updated on 29/Jan/24

A s u m o f 2800 i s i n v e s t e d, p a r t l y a t 5 %

a n d p a r t l y a t 4 % . I f t h e t o t a l i n c o m e

i s 128 p e r a n n u m, f i n d t h e a m o u n t

i n v e s t e d a t 5 % .

Answered by esmaeil last updated on 29/Jan/24

A + B = 2800

0.05 A + . 04 B = 128 \to

0.05 \times A + 0.04 (2800 - A) = 128 \to

0.01 A = 16 \to A = 1600 \to

B = 1200

\to 0.05 \times 1600 = 80

Commented by necx122 last updated on 29/Jan/24

This is great. Thank you.

Commented by esmaeil last updated on 29/Jan/24

{y o u}^{'} r e w e l c o m e .

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