Question

How many times a wheel of radius 14 cm. must rotate to get 880 m​

Answer 1

Answer:

10

Step-by-step explanation:

In one rotation wheel travels 2πr distance

so, distance travelled in one rotation = 2*22/7*14 = 88m

to travel 880 m

10 rotation is needed

Answer 2

Given,

The radius of a wheel is 14 cm.

To Find,

How many times the wheel should rotate to get 880m.

Solution,

1m =100cm.

So 880m=88000cm.

At one time a wheel can cover the distance equal to its circumference.

We know the circumference of the circle =2πr.

So here the circumference of the wheel is = 2×π×14 cm=2×$\frac{22}{7}$×14=88cm.

So in one rotation of the wheel, this covers 88cm distance.

So 88000 cm distance can be covered with $\frac{88000}{88}$=1000 rotations.

Hence, in total 1000 times rotation, the wheel can go 880m distance.