the diameter of the wheel of a car is 77 cm . how many revolutions will it make to travel 121 km
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Answer:
It will make 50000 revolutions
Step-by-step explanation:
C = πd
= 22/7 ×77 = 242 cm
(1 km=1000m & 1 m= 100cm)
∴121 km = 12100000 cm
No. of revolutions = Distance in km÷ circumference of wheel
= 12100000 ÷ 242
= 50000
jeniliya:
but the formula of circumference of circle is 2 pie r
C= 2 pie r or C= pie d.... U can use any formula..... ans will be same.
thanks for solve question
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