Chain Rule Practice Test 2 with solutions

Question : 37 of 40

Marks: +1, -0

If 7 men working 7 hours a day can do 7 units of work in 7 days, then 3 men working 3 hours a day can do how many units of work in 3 days?

Solution:

7 man + 7 hours + 7 days = 7 units
1 man + 7 hours + 7 days = 1 unit
1 man + 1 hour + 7 days =

1/7

units
1 man + 1 hour + 1 day =

1/{49}

units
3 men + 3 hours + 3 days =

{3×3×3}/{49}

units
=

{27}/{49}

units

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