Question

hari bought 20 kg of rice at rs 36 per kg and 25 kg of rice at rs32per kg. he mixed the two varieties and sold the mixture at rs 38 per kg. find his gain percent in the whole transaction

Answer 1

Cost of 1 kg rice = Rs. 36 per kg
Cost of 20 kg rice = 36*20 = Rs. 720 

Cost of 1 kg rice = Rs. 32 per kg
Cost of 25 kg rice = 32*25 = Rs. 800

Total quantity of rice = 20 + 25 = 45 kg

Cost of 45 kg rice = 720 + 800 = Rs. 1520

Selling price of the new mixture = Rs. 38 per kg

selling price of 45 kg rice = 38*45 = Rs. 1710 

Gain = 1710 - 1520 = Rs. 190 

Gain = Rs. 190

Gain % = (Gain*100)/cost price

⇒ (190*100)/1520

⇒ 19000/1520

= 12.5 %