Question

The wheel of a motor car makes 1000 revolutions in moving 440m.The diameter of the wheel is

Answer 1

Answer:

Explanation:

.140 is the diameter.

440 / 1000 = .44.

.44= π d

D = .14

Answer 2

Given:

Distance covered=440m

Revolutions made=1000

To find:

The wheel's diameter

Solution:

The wheel's diameter is 0.14m.

We are aware that the car's wheel made 1000 revolutions to cover 440m distance.

Now, in the wheel's one revolution, it covers the wheel's circumference.

Let the wheel's radius be R.

The wheels' circumference=2πR

So, 1000 revolutions' distance=1000×circumference

=2000πR

Now, this distance=440m.

On equating the values,

440=2000πR

440=2000×22/7×R

440×7/2000×22=R

140/2000=R

0.07=R

So, the wheel's diameter=2R

=2×0.07

=0.14m

Therefore, the wheel's diameter is 0.14m.