Question

O 9,976 15) An air-conditioning fan makes 125 revolutions per second. How many revolutions will it make if it runs for 30 minutes?

Answer 1

An air-conditioning fan makes 125 revolutions per second. How many revolutions will it make if it runs for 30 minutes?​

we know that

1 min=60 sec

we have

125 rev/sec

so

1 sec=1/60 min

substitute

125 rev/sec=125/ (1/60)=7,500 rev/min

Multiply by 30 min

7,500*30=225,000 rev

therefore

the answer is

225,000 revolutions