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

## Answer This Question

## Related Questions

- maths - a car travels 1 km in which each wheel makes 450 revolutions. Find the ...
- Math - A bicycle travels 42 meters for every 20 revolutions of the wheel. How ...
- Math - A bicycle travels 42 meters for every 20 revolutions of the wheel. How ...
- 6th grade - a bicycle wheel must make 13 revolutions to roll 25 meters. How many...
- physics - A bicycle wheel of radius 0.4 m is spinning at a rate of 40 ...
- math - Wheel X with radius 5 makes 5 revolutions along a road, and wheel Y with ...
- T. P. C - The radius of a wheel is 50 cm. The number of revolutions it will make...
- Maths Physocs - J and K are cycling together. K is riding a bike with a wheel ...
- Maths - The diameter of wheel is 28 cms .how many revolutions will it make in ...
- maths - a bicycle wheel has a diameter of 42 cm.how many revolutions will it ...

More Related Questions