Question

The cost of 35 envelopsis 105.How many envelops can be bought for 90 rupee

Answer 1

So easy
35 envelope 105
1 envelop =105/35=3
then
for rs 90 =90/3=30 envelope

Answer 2

cost of 35 envelopes = Rs105
then cost of 1 envelope = Rs105/35
=Rs3
no of envelope can be bought in 90 rupees = 90/3
= 30envelopes