Posted by **ashley** on Thursday, January 31, 2013 at 9:15pm.

a helicopter blade spins 775 times in 3 minutes. find the rate of the revolutions per second.

- math -
**Jessica**, Thursday, January 31, 2013 at 9:16pm
divide 775 by 3

- math -
**Ms. Sue**, Thursday, January 31, 2013 at 9:18pm
Enough, Jessica!!

The question asks for the revolutions per second, not per minute.

3 * 60 = 180 seconds in three minutes.

775/180 = ______ revolutions per second.

- math -
**Reiny**, Thursday, January 31, 2013 at 9:19pm
there are 180 seconds in3 minutes

so the number of revolutions/sec = 775/180

= appr 4.3 rotations/sec

## Answer This Question

## Related Questions

- 7 grade math - a helicopter blade spend 775 times in 3 mintues find the rate in ...
- physics - A helicopter blade spins at 110 revolutions per minute. Its tip is 5....
- math - Assuming that a table saw blade has a diameter of 12 inches and spins at ...
- Physics - A helicopter propeller blade starts from rest and experiences a ...
- math - Assuming that a table saw blade has a diameter of 12 inches and spins at ...
- Physics - A CD rotates at 500 (revolutions per minute) while the last song is ...
- math - Assuming that a table saw blade has a diameter of 12 inches and spins at ...
- college physics - The blade in a food processor spins at 1700 rpm. After the ...
- Trig - A fan makes 3 revolutions per second. The blades are 21 inches long. How ...
- college - A ceiling fan has 15 -inch blades (so the radius of the circular fan ...

More Related Questions