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Maths-

General

Easy

Question

How many times will the wheel of a car rotate in a journey of 88 km if its known that the diameter of the wheel is 56 cm?

hint Hint:

Try to find circumference of the wheel

The correct answer is: 50000 rotations

It is given that diameter of the wheel = 56 cm
$rightwards double arrow$ Radius = $fraction numerator text diameter end text over denominator 2 end fraction$ = $56 over 2$ = 28 cm
Circumference of the circle = 2 $straight pi$ r
= 2 × $22 over 7$ × 28
= 176 cm
Total distance = 88 km = 8800000 cm
No of rotations = $fraction numerator text total distance end text over denominator text circumference end text end fraction$ = $8800000 over 176$ = 50000 rotations

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