Question

the diameter of a circular wheel is 60cm.how far will the bicycle travel in 140 turns of the wheel

Answer 1

Answer:

radius = 30 cm

distance covered in 1 rotation = perimeter of wheel

perimeter ( circumference ) = 2π r

= 2×π×30

= 60π cm

distance covered in 140 revolutions = 140×60π

= 140×60×22/7

= 20 × 60 × 22

= 1200 × 22

= 26400 cm

Answer 2

Given:

Diameter = 60 cm

Number of turns = 140

To Find:

The distance traveled

Solution:

Find the distance covered in 1 turn of the wheel:

Circumference = πD

Circumference = 22/7 x 60

Circumference = 1320/7 cm

Find the distance covered in 140 turns of the wheels:

1 turn = 1320/7 cm

140 turns = 1320/7 x 140

140 turns = 26400 cm

140 turns = 264 m

Answer: The bicycle will have traveled 264 m