Question

if 20 articles cost 90 then the cost of 9 articles is​

Answer 1

Step-by-step explanation:

cost of per article =90/20=9/2

cost of 9 articles=9/2*9=81/2

Answer 2

Step-by-step explanation:

cost of 20 articles= 90 rupees

cost of 9 articles be = 90/20 × 9 = 40.5 Rs/-