"Four gardeners with four grass mowers mow 400 sq. m of ground in 4
Channel: Doubtnut
Date: 2020-04-05

"Four gardeners with four grass mowers mow 400 sq.
 m of ground in 4 hours. How long would it take for eight gardeners with eight
 grass mowers to mow 800 sq. m of ground? 
`4\ hou r s`
b. `6\ hou r s`
c. `8\ hou r s`
d. `12\ hou r s`"