Chain Rule Practice Test 2 with solutions

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Question : 35 of 40

Marks: +1, -0

18 men complete a piece of work in 5 days. In how many days can 21 men complete the same piece of work?

$3 2/7$
$4 2/7$
$4$
$5 2/7$

Solution:

Men	Days
18	5
21	x

⇒

x/5

=

{18}/{21}

∴ x =

{18}/{21} × 5

=

{30}/7

=

4 2/7

days

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