Question

A car travels 1 km distance in which each wheel makes 450 complete revolutions. Find the radius of wheel.

Answer 1

Distance covered in 450 revolutions =1000 m
Therefore distance covered in 1 revolution = 1000/450 = 2.23 m
2×pi×r=2.23
r=2.23×7/22×2
r = 0.35 m

Answer 2

distance=1000m
revolution =450
distance covered in one revolution =1000/450
$c = 2\pi r \: \\ \frac{1000}{450} = 2 \times \frac{314}{100} r \\ r = \frac{1000}{450} \times \frac{100}{628} \\ r = 0.35$
0.35m