Question

The area of a square field is 14.0625 hectares. how long will it take to go round it four times at the rate of 3.6km per hour​

Answer 1

Step-by-step explanation:

1 hectare =10000 m sq.

14.0625 hectares =10000×14.0625

=140625 m sq.

if we have to take round, we will go by it's edges ie. by it's perimeter.

area of square = side ×side

140625= side sq.

root 140625 =side

375 = side

perimeter of square = 4×side

=4×375

=1500 m

distance = 1500m

1 km. =1000m

3.6 km. = 3600m

speed = 3600m per hour

speed = distance/time

time =distance/speed

=1500 /3600

=15/36

=0.41 hours

we round it four times so,

=time×4

=0.41×4

= 1.64

It will take about 1.64 hours to complete 4 rounds at the rate of 3.6 km per hour.