Question

Rajesh bought 80 kg of mangoes at Rs. 30 per kg. he sold 80% of these at rupees 50 per kg and the remaining mangoes at 25 rupees per kg. find his gain or loss percent on the whole transaction.

Answer 1

Cost price of 80kg mangos =80*30 rupees = 2400
now,80% of 80 kg = 80*80/100 = 64 KG
remaining kg are =80-64= 16
1.The SP of 64 kg at 50rs per kg = 3200rs
2.he sold 16 kg at rs of 25 rs per kg =16*25 = 400rs
total amount he earned by selling magos is = 3200+400 =3600
so,he obviously made profit (as SP>CP)
profit = rs 3600 - rs2400 = rs 1200
on the 2400 he made 1200 of profit, how much profit is made on rs100?
profit in percentage = 1200/2400 *100 = 50%......... there you go...

Answer 2

Total CP=Rs80×30=2400
first group of mangoes=80%of80
=80/100×80kg
=64kg
=64×50=Rs3200
second group of mangoes=16kg
=16×25=Rs400
Total SP=3200+400=3600
profit=Rs(3600-2400)=1200
profit%=1200/2400×100
=50%