Question

The radius of a wheel of a bicycle is 40 cm.
a) find the circumference of the wheel.
b) find the distance covered by the bicycle in 200 complete revolutions of the wheel.

Answer 1

Answer:

Diameter of circular wheel =2r=56cm

Circumference =2πr=π(2r)=56πcm

1 revolution of wheel covers distance equal to its circumference =56πcm

Total distance covered by wheel =1.1km=1.1∗1000m=1100m=1100∗100cm=110000cm

Total Distance = Number of revolutions ∗ 1 revolution distance

Number of revolutions =

1revolutiondistance

TotalDistance

=

56π

110000

=625.25≈625

The number of revolutions made by a bicycle wheel 56 cm in diameter in covering a distance of 1.1 km is 625.

Answer 2

Answer:

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