Question

30 men build 15 rooms of equal size in 18 days. How long will 20 men take to complete 10 Row's of the same?

Answer 1

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Answer 2

Answer:

Time taken by 20 men to build the 10 room in equal size is 18 days.

Step-by-step explanation:

Given,30 men take 18 days to build 15 room in equal size wall.

1 man will build the room in equal size

$=(30 \ men*15 \ room*18\ day)$      

$=30 \ men*\frac{15}{18} \ rooms/day$

$=1\ men*\frac{15}{18*30}\ room/day$

$1men= \frac{15}{18*30}$

$1 \ men=\frac{1}{36}$

Let time taken be x days to complete 10 Row's of the same

$20\ men=\frac{20}{36} day$

$\frac{20}{36}*x=10 \ room$

$x=10*\frac{36}{20}\\ =18 \ days$

Hence, time taken by 20 men to build the 10 room in equal size is 18 days.