Q31. How long will aman take to make a round of circular field of radius 21m.
cycling at the speed of 8km/h
Answers
Answered by
1
Answer:
9.5sec (approximately)
hope this will help you
Answered by
0
Answer:
It will take him 59.4 seconds
From the question,
Radius of the circular field, r=21m
Cycling at the speed of =8km/h
= 3600
8×1000
m/s....[Because 1km=1000m,1hr=3600sec]
= 3600 8000
=3680
... [divide by 4]
= 920
m/s
Distance covered by the cyclist = Circumference of the circular field
=2πr
=2×
7
22
×21
=2×22×3
=132m
Time taken by the cyclist to cover the field = (Distance covered by the cyclist / Speed of the cyclist)
= 920
132
=132× 209
=33× 59
=59.4sec
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