Question

Rice is now being sold at Rs. 29 per kg. During the last month, its cost was Rs. 25 per kg. By how much percentage should a family reduce its consumption, so as to keep the expenditure the same as before? (correct to nearest integer)If the area of a square is decreased by 19%, then the diagonal of the square is decreased by
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Answer 1

Answer:

13.33%

step by step explanation:

Old price=Rs 26 per Kg.

New price=Rs 30 per Kg.

Increase in price =Rs 4 per Kg.

Increased percentage = $\frac{4}{26}$ × 100=$\frac{200}{13}$%

now, reduction in consumption, so as to keep the expenditure fixed,

According to formula, ($\frac{a}{100+a}$) × 100

where a=$\frac{200}{13}$

$\frac{\frac{200}{13}}{100 +\frac{200}{13} }$× 100= 13.33%