Question

40 bags of cotton cost ₹ 2200, If I can exchange 25 bags of cotton for 30 grams of silver, then find the price of 150g of silver.

• A. Rs 6875
• B. Rs 6675
• C. Rs 6575
• D. Rs 6975

Answer 1

The correct option is A

Rs 6875

In this question, we need to use direct proportion twice.
First, we need to find the price of 25 bags of cotton.
$\frac{2200}{40}$ = $\frac{x}{25}$
$x=\frac{2200\times 25}{40}=₹1375$
This value gives the price of 30 grams of silver.
To find the price of 150 grams of silver, we apply direct proportion again.
$\frac{30}{1375}$ = $\frac{150}{y}$
$y=\frac{1375\times 150}{30}=₹6875$