Question

cost of 4 books=120
cost of 3 books=?
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Answer 1

Answer:

Answer is 90

Step-by-step explanation:

Given , cost of 4 books = 120

cost of 3 books=?

Now, cost of 1 book = 120/4 = 30

Now cost of 3 books =

30 × 3 = 90

Hope it helps..

Answer 2

Answer:

Rs. 90

Step-by-step explanation:

Cost of 4 books = Rs. 120

Therefore, cost of 1 book = Rs. (120/4)

= Rs. 30

Therefore, cost of 3 books = Rs. (30*3) = Rs.90