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

A. 1

B. 7/2

C. 7

D. 49

Answer : C. 7

Explanation:

Let the required number days be x.
Less spiders, More days (Indirect Proportion)
Less webs, Less days (Direct Proportion)
Hence we can write as,

If 7 spiders make 7 webs in 7 days
    • 1 x 7 x x = 7 x 1 x 7
    x = 7.

 

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