How many times will a wheel of radius $35 c m$ be rotated to travel $660 m$ ?
(Take $π = \frac{22}{7})$ .

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Solution

Radius of wheel $(r) = 35 c m$
Distance covered in one rotation $= 2 π r = 2 \times \frac{22}{7} \times 35 = 220 c m$
So, Number of rotations covered in $660 c m = \frac{Total distance travelled}{Distance travelled in one rotation} = \frac{660}{220} = 3$

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How many times will a wheel of radius 35 cm be rotated to travel 660 m?(Take π=227).

Radius of wheel (r)=35 cmDistance covered in one rotation =2πr=2×227×35=220 cmSo, Number of rotations covered in 660 cm=Total distance travelledDistance travelled in one rotation=660220=3

How many times will a wheel of radius $35 c m$ be rotated to travel $660 m$ ?
(Take $π = \frac{22}{7})$ .

Radius of wheel $(r) = 35 c m$
Distance covered in one rotation $= 2 π r = 2 \times \frac{22}{7} \times 35 = 220 c m$
So, Number of rotations covered in $660 c m = \frac{Total distance travelled}{Distance travelled in one rotation} = \frac{660}{220} = 3$