Posted by Aravind on Wednesday, February 23, 2011 at 11:44am.
The radius of a wheel is 7 cm. In covering 44 km, how many revolutions will it make?

Maths  drwls, Wednesday, February 23, 2011 at 11:51am
N = 44,000 m/(2*pi*0.07 m)
= 100,000 (rounded to 4 sig. figures)

Maths  Ms. Sue, Wednesday, February 23, 2011 at 11:53am
C = pi * d
C = 3.14 * 14
C = 43.96 cm = 0.4396 meters
1 km = 1000 m
Take it from there.

Maths  jane, Tuesday, March 8, 2016 at 7:01am
circumference = 2 * pi * r
= 2 * 22/7 * 7
= 44 cm
1 km = 1,00,000 cm
44 km = 44,00,000 cm
revolutions to be made =
44,00,000/44
= 1,00,000

Maths  christina, Tuesday, March 8, 2016 at 7:17am
C = 2 * pi * r
= 2 * 22/7 * 7
= 44 cm
1 km = 1,00,000 cm
44 km = 44,00,000 cm
revolutions to be made =
44,00,000/44
= 1,00,000
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