Question

a reduction of 10% in the price of rice would enable a man to buy 2kg more in 30rs. .Find the reduced price and the original price of rice. ​

Answer 1

price of rice after reduction

15/kg

then

for original price

The amount that the person has is constant.

If price reduces by 20%, the quantity that can be purchased will increase by 20/(100–20) = 25%

Now 25% is equivalent to 3.5 kg

so, 100% = 3.5*4= 14 kg

Hence for Rs. 77 he can buy 14 kg.

So, price per kg = 77/14 = 5.5 Rs/Kg

Hope it helps :-)