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

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

Let the required number days be x Less spiders, More days (Indirect Proportion) Less webs, Less days (Direct Proportion) Spiders 1 : 7 ] :: 7 : x Webs 7 : 1 ∴ 1 x 7 x x = 7 x 1 x 7 ⟹ x = 7.

1
7⁄2
7
49

Correct Answer: 7

Explanation:

Let the required number days be x

Less spiders, More days (Indirect Proportion)

Less webs, Less days (Direct Proportion)

Spiders	1	:	7	]	:: 7 : x
Webs	7	:	1	]	:: 7 : x

∴ 1 x 7 x x = 7 x 1 x 7

⟹ x = 7.

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