Question

if the radius of a wheel is 21cm what is the distance travelled by wheel in 3 revolution?​

Answer 1

Answer:

The distance travelled by the wheel in 3 revolutions is 376 cm.

Step-by-step explanation:

radius of the wheel (r)= 21 cm

circumference(perimeter) of the wheel = $2\pi r$

distance travelled by the wheel in 1 revolution = circumference(perimeter) of the wheel = $2\pi r$

$2\pi r = 2 *\frac{22}{7} *21$

= $2*22*3$

= $122$

distance travelled by the wheel in 3 revolutions = $3 *122$

                                                                                = 376 cm

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Answer 2

Answer:

radius of wheel=21cm

perimeter of wheel = 2πr so,

2×22/7×21=132cm

it cover 132cm in 1 revolution

distance travelled in 3 Revo. = 3×132

=396cm