(6.) The diameter of the wheel of a car is 70 cm.
diameter of the wheel of a car is 70 cm. How many revolutions wil
1.65 km?
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Answered by
12
1.65 km = 1.65 ×1000×100 cm
= 165000 cm
now,radius = diameter/2
= 70/2
=35 cm
now, circumference = 2π r
= 2×(22/7)×35
= 220 cm
it means, 220 cm = 1 revolution
then, 165000 cm = 165000/220
= 750 revolution
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Answered by
6
Answer:
circumference of circle=2πr
d=2r
r=d/2
r=70/2=35cm
total distance=1.65km=1650m
one revolution=2×π×35=219.91cm
no of revolution=total distance/one revolution
=1650×100/219.91
=750 revolutions
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