Problem: if 4 spiders make 3 webs in 9 days , then how many days are needed for 1 spider to make 1 web ?
Rationale: "explanation : let , 1 spider make 1 web in x days . more spiders , less days ( indirect proportion ) more webs , more days ( direct proportion ) hence we can write as ( spiders ) 4 : 1 ( webs ) 1 : 9 } : : x : 3 â ‡ ’ 4 ã — 1 ã — 9 = 1 ã — 3 ã — x â ‡ ’ x = 12 answer : option b"
annotated_formula: multiply(1, 4)