Question

the length of a playground is 75 metre 20 CM breadth is 34m80 CM if the cost of levelling is rupees 1.50 per square metre how long the boy will take to make 3 runs if he walks at the rate of 1.5 per second please answer fast my exam is tomorrow please please​ please please please please please please please please please please please

Answer 1

Answer:

Length of the play ground =75.20m

Breadth =34.80m

Area 75.20 m x 34.80 cm = 2616.96

Cost of leveling =

2616.96 x 5.50=rupees 14393.38

the boy take to go three times around the field =

Perimeter =2(l+b)

=2(7520+3480)

=220m

He goes three times around it so 220mx3=660m

Time he will take

Speed = 1.5m/s

Time =distance /time

660/1.5

=440seconds

Answer 2

Given,

length of playground = 75 m 20 cm = 75.20 m

breadth of playground = 34 m 80 cm = 34.80 m

So, Perimeter of playground

= 2(l + b) = 2(75.20 + 34.80)

= 220 m

Since the boy took 3 rounds, distance covered = 3 x 220 = 660 m

Speed of walking = 1.5 m per sec

We know, speed = distance/ time

Or, time = distance/ speed

Therefore, time = 660/1.5 = 440 seconds or 7.33 minutes