Question

A tyre of a car wheel has an outer diameter of 30cm. How many times will the wheel rote on a journey of 5km?

Answer 1

Answer:

The diameter is 30 cm, therefore the radius is 15 cm.  The circumference of the tire is found by using the formula C = 2πr.  C ≈ 2(3.14)(15) ≈ 94.2 cm. 5 km = 500,000 cm (5 x 1000 x 100).  500,000 ÷ 94.2 ≈ 5307.86 or about 5300 times (revolutions).  (using π, instead of 3.14, I got 5305.16 revolutions)

PLEASE VOTE MY ANSWER AS EXCELLENT

PLEASE VOTE MY ANSWER AS BRAINLIEST

Answer 2

Answer:

I love math, and love to teach it

Step-by-step explanation:

The diameter is 30 cm, therefore the radius is 15 cm.  The circumference of the tire is found by using the formula C = 2πr.  C ≈ 2(3.14)(15) ≈ 94.2 cm. 5 km = 500,000 cm (5 x 1000 x 100).  500,000 ÷ 94.2 ≈ 5307.86 or about 5300 times (revolutions).  (using π, instead of 3.14, I got 5305.16 revolutions)