Question

40 bags of cotton cost ₹ 2,200. But by exchanging 25 bags to the shopkeeper, we get 30 grams of silver. Find the price of 150 grams of silver by exchanging relevant number of cotton bags.

• A. ₹ 6,875
• B. ₹ 6,675
• C. ₹ 6,575
• D. ₹ 6,975

Answer 1

The correct option is A

₹ 6,875

In this question, we need to use the direct proportion twice.
First, we need to find the price of 25 bags for exchanging silver. That can be found out by applying direct proportion.
$\frac{2200}{40}$ = $\frac{x}{25}$
x = ₹ 1,375
This value of x 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 = ₹ 6,875