Question

If 3 Sweepers can sweep 18 rooms in 4 hours, how many Sweepers would be required
to sweep 21 rooms in 2 hours at the time
speed​

Answer 1

Answer:

4 or 5 sweepers can sweep in 2 hours

Answer 2

Answer:

7 Sweepers would be required to sweep 21 rooms in 2 hours at the time speed.

Given Data:

3 sweepers sweep = 18 rooms in 4 hours

To Find:

To calculate how many sweepers need to sweep 21 rooms in 2 hours at the time speed

Explanation:

Step 1:

3 sweepers can sweep 18 rooms in four hours

Step 2:

So, 1 sweeper can sweep in an hour $=\frac{18}{3 \times 4}=1.5\ \mathrm{room}$

Step 3:

∴ 21 rooms required $=\frac{21}{1.5}=14 \text { hours }$

Step 4:

So, Number of sweeper required $\bold{=\frac{14}{2}=7}$