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
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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
Answered by
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
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