Question

How many times does a wheel of radius 28 cm rotate to go 5.28 m?​

Answer 1

SOLUTION

TO DETERMINE

The number of times a wheel of radius 28 cm rotates to go 5.28 m

EVALUATION

Here it is given that the radius of the wheel is 28 cm

∴ r = 28

So circumference of the wheel

$\sf{ = 2 \pi r \: \: cm}$

$\displaystyle \sf{ = 2 \times \frac{22}{7} \times 28 \: \: cm}$

$\displaystyle \sf{ = 8 \times 22 \: \: cm}$

$\displaystyle \sf{ = 176 \: \: cm}$

Now 5.28 m = 528 cm

So the required number of times a wheel of radius 28 cm rotates to go 5.28 m

$\displaystyle \sf{ = \frac{528}{176} \: \: times }$

$\displaystyle \sf{ = 3 \: \: times }$

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