Question

if the cost of 15 books is Rs 240,find the cost of 39 such books.

Answer 1

Cost of 15 books = rs 240
Cost of 1 book = 240 / 15
= 16 rs
Cost of 39 books = 39 × 16
= Rs 624 ans

Answer 2

cost of 15 books = Rs 240
cost of 1 book = 240/15 = 16
cost of 39 books = 16 x 39 =Rs 624
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