Question

if a cost of 20 mathematics books is Rs 390.50 the what is the cost of 2 mathematics book?​

Answer 1

Answer:

Step-by-step explanation:

Cost of 20 book=390.50

So cost of one book =390.50/20=19.525

Hence,cost of 2 book=2×19.525=39.05

Answer 2

Step-by-step explanation:

cost of 20 books is 390.50

cost of 1 book is 390.50/20

cost of 2 book is RS 390.50×2/20=RS 39.05