If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days? Correct Answer 7

Let the required number days be x. Less spiders, More days (Indirect Proportion) Less webs, Less days (Direct Proportion) Spider 1 ; 7 Webs 7 : 1 ∴1×7×x = 7×1×7 ⇒x = 7

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