Math, asked by anum4eyvupsar, 1 year ago

the radius of the wheels of a bus is 70cm. How many revolution per minute must a wheel make in order to move at a speed of 66km per hour??

Answers

Answered by SARDARshubham
102
given ;
Radius of the wheel of bus = 70 cm = 0.7 m

Distance covered in one revolution
= Circumference of the wheel
= 2πr
= 2×22/7 × 0.7
= 4.4 m

Speed = Distance/Time
66 km/hour
= 66000/60 m/min
= 1100 m per min

No of revolution to move at 1100m/min speed
= 1100/4.4
= 250 revolutions
Answered by Fuschia
25
Radius of the wheel = 70cm =0.7 m

Distance covered in one revolution = Circumference of the wheel

= 2πr = 2 x 22/7 x 0.7 = 4.4 m

Now speed = 66km/hr = 66000/60
= 1100m/min

Total number of revolutions = 1100/4.4 = 250
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