Question

7 pens coasts rs 56. What is the coast of 21 pens

Answer 1

Hello there!

Cost of 7 pen is rs. 56
so, cost of 1 pen- 56/7 =8

Hence, Cost of 21 pens = 21*8= 168₹.
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Answer 2

cost of 7 pens = 56
cost of 1 pen = 56/7
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cost of 21 such pens:--
==> 56/7×21
==> 8×21
==> 168