Question

The radius of a wheel of a cycle is 70 cm and it takes 5 minutes to make 300 rotation . Find the speed of the cycle in km per hour .

Answer 1

t=5 min
=5×60
=300sec

HOPE THIS HELPS.
MARK AS BRAINLIEST

Answer 2

Answer:

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Radius of the wheel = 70 cm

Circumference =

$2\pi \: r = (2 \times \frac{22}{7} \times 70) = 440 \: cm$

Distance covered by the wheel in 1 revolution = 440 cm

Distance covered by the wheel in 500 revolution = (440×300) cm = 132000 = 1.32 km

Distance covered in 1 hour

$= \frac{1.32}{5} \times 60 \\ = 15.84$

Hope it helps.