Question

if the cost of 5 kg of wheat is 82. 50 rupees then the quantity of wheat which can be purchased for 198 rupees

Answer 1

weight of wheat can be bought in 1 rs
=5÷82.5
=.06060.....
therefore
weight of wheat can be bought in 198rs
= .0606...×198 =12
therefore 12 kg of wheat can be bought in 198 ₹

Answer 2

cost of 5 kg wheat = 82.50
cost of 1 kg = 82.50/5 = 16.5
in 1 rupees we can buy 1/16.5 kg
hence in 198 rupees we can buy
1/16.5 × 198 = 12 kg
hope this will help you.
thank you.