Question

If 20 articles cost 90, then the cost of 9 articles is?

Answer: 40.50

Answer 1

$\sf\small\underline\red{Answer:-}$

cost of 20 articles = ₹ 90

cost of 1 article = ₹ 90/20 = ₹ 4.5

Cost of 9 Articles = ₹ 9 × 4.5 = ₹ 40.5