Question

A wheel has a radius of 15 cm. Approximately how far does it travel in 4 revolutions?

A.
188.4 cm

B.
94.2 cm

C.
376.8 cm

D.
47.1 cm

Answer 1

1 revolution is 2xPixr
it is 2xPixr=2x 3.14 x 15=94. 2cm
for 4 revolutions

it is  94. 2cmx4= 376.8 cm
the answer is C : 376.8 cm