Question

Fifteen postcards cost Rs 2.25. What will be the cost of 36 postcards? How many postcards can we buy in Rs 45?

Answer 1

Given cost of 15 post cards = Rs 2.25
Cost of 1 post card is = 2.25/15
$Hence,thecostof36postcards=\left(2.25/15\right)\times 36=Rs5.40$
Number of post cards bought for Rs 2.25 = 15
Numbers of post cards bought for Rs 1 = 15/2.25
$HencenumberofpostcardsboughtforRs45$$=\left(15/2.25\right)\times 45=300$