Question

Four gardeners with four grass mowers mows 400 square metres of ground in four hours.How long would it take for eight gardeners with eight grass mowers to mow 800 square metres of ground?

• A. $8$ hours
• B. $6$ hours
• C. $2$ hours
• D. $4$ hours

Answer 1

The correct option is D $4$ hours

Since 1 Gardner is using one Mower
$\frac{M_1\times h_1}{w_1}=\frac{M_2\times h_2}{w_2}$
$\frac{4\times 4}{400}=\frac{8\times h_2}{800}$
$h_2=4hrs$