Question 101

A wheel has diameter 84 cm, then how far does the wheel go (in metres) in 16 revolutions? (Take $$\pi = \frac{22}{7}$$)

Solution

Given that wheel Diameter = 84 cm and revolutions = 16

we know that, Perimeter = $$2 \pi r $$

$$\Rightarrow 2 \pi \dfrac{84}{2} $$

$$\Rightarrow 2 \times \dfrac{22}{7} \times 42 $$

$$\Rightarrow 2 \times 22 \times 6 $$

$$\Rightarrow 264 $$cm

Now, Does wheel go (in meter ) = $$ 264 \times 16 \times \dfrac{1}{100} $$

$$\Rightarrow 4224 \times \dfrac{1}{100} $$

$$\Rightarrow 42.24 $$ Meter Ans

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