Question

Packets of 12 pencils each, cost Rs 499.20. Find the cost of 65 packets of 10 pencils each.

Answer 1

Given total number of pencils in 52 packets of 12 pencils each = $52\times 12$
= 624 pencils
Also given that cost of 624 pencils = Rs 499.20
Cost of 1 pencil = (499.20/624)
Number of pencils in 65 packets of 10 pencils each = $65\times 10$
= 650 pencils
Therefore, cost of 650 pencils = $\left(499.20/624\right)\times 650$
= Rs 520.