Question

Solve the following question and mark the best possible option.
Four gardeners with four grass mowers can mow 400 square meters of ground in four hours. How long would it take for eight gardeners with eight grass mowers to mow 800 square meters of the ground?

Options

• 8 hours

• 6 hours

• 12 hours

• 4 hours

Answer 1

4 hours
If 4 gardeners, 4 grass mowers and 400 sq meter ground can be mowed in 4 hours that means 1 gardener, 1 grass mower can mow 100 sq meter in 4 hrs. Hence, 8 gardeners, 8 grass mowers can mow 800 sq meter also in 4 hours.

Answer 2

4 hours

Explanation:

Since 1 Gardner is using one Mower

`("M"_1xx"h"_1)/"w"_1=("M"_2xx"h"_2)/"w"_2`

`(4xx4)/400=(8xx"h"_2)/800`

h₂ = 4 hr