Question

Cost of 15 books is ₹900. Find the cost of 20 such books. ​

Answer 1

Answer

Cost of 15 notebook is 900

cost of 1 notebook

$\sqrt[15]{900?}$

so cost of 1 notebook is 60 rs.

cost of 20 notebook is

$60 \times 20$

= 1200

so cost of 20 such notebook is Rs. 1200

Answer 2

Cost of 15 book = ₹900
Therefore cost of one book = 900/15 = ₹ 60

Therefore Cost of 20 book = 60 x 20 = ₹1200

Therefore Cost of 20 such books is ₹1200

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