the radius of the wheel of a toy is 7 CM. find the distance covered by the wheel in hundred rotation
Answers
Answer:
540 cm
Step-by-step explanation:
The formula for the circumference C of a circle is: C = 2πr, where r is the radius of the circle (wheel) and π (pronounced "pi") is the famous irrational number. Let π = 3.14.
C = 2πr
= 2(3.14)(7 cm.) (Note: We were given that the radius r of wheel = 7 cm.)
= (6.28)(7 cm.)
C = 43.96 cm.
Now, to find out how many times the given wheel will have to rotate in order to cover the distance of 540 cm., we'll proceed as follows:
Number of required rotations of wheel, N = distance covered/wheel's circumference
N = 540 cm./43.96 cm
N = 12.28 (rounded to the nearest hundredth of a rotation)
Therefore, the given wheel will need to rotate approximately 12.28 rotations in order to cover the distance of 540 cm.
Step-by-step explanation:
circumference of a circle=2πr
circumference=2*22/7*7
circumference 44
distance covered=44*100
4400is the answer
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