c) A wheel of radius 14 cm rotates 5 times. Find the distance covered by the wheel
Answers
Answered by
6
Answer:
use 2 pie R
put the value
ans. 88cm
multiple by 5
final ANS ... 440 cm
Step-by-step explanation:
hope u understood !!!
Answered by
0
Step-by-step explanation:
sharing an example to help you
Example 1:
To cover a distance of 10 km a wheel rotates 5000 times. Find the radius of the wheel
. Solution:
No. of rotations = 5000.
Total distance covered = 10 km, and we have to find out the radius of the circle.
Let ‘r’ be the radius of the wheel Circumference of the wheel = Distance covered in 1 rotation = 2πr.
In 5000 rotations, the distance covered = 10 km = 1000000 cm.
Hence, in 1 rotation, the distance covered = 10000005000cm=200cm
But this is equal to the circumference. Hence, 2πr = 200 cm
r = 200/2π
r = 100/π
Taking the approximate value of π as 22/7,we ge
t
r = 100 x 7/22 r = 31.82 cm approx.
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