Question

I need to know the 3rd sub division Answer

Answer 1

Given

Area of square field=1024

1) length of side =
$\sqrt{1024 } = 32m$
2) perimeter of square =4a

=4x32=128m

3) man make 5 round so he covers =128x5=640m


Time take =distance /speed

Let chance the speed in m/sec first

4.5KM/H =4.5x1000/3600 =4.5x5/18

=22.5/18 m/s

Now.

Time =640/(22.5/18) =512 sec = 8 minutes 32 seconds