Problema Solution
a boy has a bike with wheels of diameter 80cm his wheels go through 200 revolutions.
how far in metres has he travelled?
Answer provided by our tutors
the distance = 200*circumferences of the circle with diameter d = 80 cm
circumferences of the circle C = 2*r*pi, where r = d/2 = 80/2 = 40 cm
200C = 200*2*40*3.14 = 50,240 cm = 502.4 m
he traveled 502.4 meters.