Question

the radius of the chain wheel of a toy bicycle is 7cm given that the portion of the chain in contact with the wheel is of length 11 cm calculate the angle subtended at the centre of the wheel by this portion of the chain​

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.