00:02
Hi, so here in this question we have given that the bicycle wheel is having diameter of 72 cm.
00:09
It covers the distance 4 .7 km in time 1 .8 arm.
00:15
Then we have to find out the revolution of the wheel of bicycle and its angular velocity.
00:21
Now first if we find out the radius.
00:24
Radius will be equal to diameter divided by 2 which will be equal to 72 divided by 2.
00:30
By 2 that is 36 cm and which will be equal to 0 .36 meter now first we have to find out the revolution of wheel of bicycle so first we will find out the circumference circumference of bicycle will be equal to 2 pi r that is 2 into 3 .14 into radius r 0 .36 on calculating we will get this value as 2 .26 meter.
01:06
Now as 2 .26 meter corresponds to one revolution then 1 meter will correspond to 1 divided by 2 .26 revolution and we have to find out for 4 ,700 meters so 4 ,700 will correspond to 1 upon 1.
01:33
2 .26 multiplied by 4 ,700 revolution.
01:40
So the revolutions will be equal to approximately 2080 revolution...