Question

20 books are are bought for rupees 200.how much will 45 books cost​

Answer 1

Answer:

Rs 450

Step-by-step explanation:

Cost of 1 book = 200/20

                        =  Rs 10

Cost of 45 book = 45*10

                           = Rs 450

Answer 2

Answer:

cost of 20 books =200

then,

cost of 45 books =?

200x45/20 = 450