Question

The radius of the front wheel of David's bike is 51cm.
David goes for a cycle and travels 62.95km.
How many full revolutions did David's front wheel complete?
just answer, 143 points if correct I promise

Answer 1

given that

radius(r)=51cm

1m=100cm

so,51cm=51/100=0.51m

:-r=0.51m

total distance(dis)=62.95km

1km=1000m

so,62.95km=62.95*1000=62950m

so total no.of revelutions(R)=total distance travelled/radius of the circle(wheel)

=>62950/0.51=123,431.372549 rotations

hope it helps you.pls like my answer.

Answer 2

Hey there! here is your answer!Hope it helped!

please mark as brainliest answer! :)

Answer:

Hey there! To answer your question , let me tell you what is the perimeter of a circle called and how to find it.

What is the perimeter of a circle called?

Ans. The perimeter of a circle is known as

What is perimeter?

Ans. Perimeter is nothing but the measure of the boundary of something.

How do we find the perimeter of a circle?

Ans. We can find the perimeter of a circle with the formula 2πr. π can be equal to 22/7 or 3.14. r= radius of the circle.

Step-by-step explanation:

So, following the definition of the perimeter of a circle, and its formula, let us answer your question .

The radius of the front wheel of David's bike is 51cm. David goes for a cycle and travels 62.95km. How many full revolutions did David's front wheel complete?

Ans. So, first let us find the perimeter of the wheel of davids bike.

Perimeter= 2πr

= 2* 3.14 *51cm ( radius )

Perimeter= 320.28cm( workings in the picture) .

Now, we need to divide the perimeter of the circle by distance traveled to get the number of revolutions.

Let us convert kilometres to centimetres so that we can divide easily.

62.95km=6295000 centimeters.

6295000÷320.28= 19654.677 revolutions.

This can be rounded off to 19654 revolutions David's front wheel completed.

Hope it helped!

please mark as brainliest answer! :)