Question

A carriage wheel makes 20,000 revolution in going over a distance of 15.7 kilometre find the radius of the wheel taking π= 3.14​

Answer 1

Answer:

1 revolution covers one perimeter of circle

Step-by-step explanation:

perimeter of the circle= 2πr

20,000 revolutions = 15.7 km

1 revolution=?

= 15.7/20000= 2πr

15.7/20000x2x3.14=r

157/2000x2x314=r

1/8000 km = r

1 km = 1000m

1/8000km= ?

radius= 1/8 m

1 m =100cm

1/8m =?

r= 100/8= 12.5 cm