Question

A bicycle wheel has a diameter of 70 cm. how many times would the wheel rotate to cover a distance of 50 KM?

Answer 1

✰✰|| Given ||✰✰

• diameter of wheel = 70cm

• Distance it has to cover = 50km

✰✰|| To Find ||✰✰

• Radius of wheel

• circumference of wheel

• no. of times wheel rotate

✪|| Solution ||✪

Radius of wheel = diameter/2

→ Radius of wheel = 70cm/2

→ Radius of wheel = 35cm

Circumference of wheel = 2πr

→ Circumference of wheel = 2 × 22/7 × 35cm

→ Circumference of wheel = 44/7 × 35cm

→ Circumference of wheel = 44 × 5cm

→ Circumference of wheel = 220cm

no. of times wheel rotate = distance/circumference

⇒ no. of times wheel rotate = 50km/220cm

⇒ no. of times wheel rotate = 50000m/2.2m

⇒ no. of times wheel rotate = 22,727.27

no. of times wheel rotate is 22,727.27