Question

The cost of 35 envelopes is rs 105. How many envelopes can be purchased for rs90

Answer 1

cost of 35 envelope =105
cost of 1 envelope =105/35=3
envelopes we can purchase in rs90=90/3
=30
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Answer 2

Cost of 35 envelops = Rs. 105
So, cost of 1 envelop = Rs. (105/35)
=> Rs. 3

Let the no. of envelops can be puchased for Rs. 90 be x.

So, 3×x=90
=> x = 90/3
=> x = 30

So 30 envelops can be purchased in Rs. 90.

Hope the answer is helpful !!