Question

10. Multi-Step In 3 minutes, a damselfly's wings beat 2,700 timesand a butterfly's wings beat 2,100 times. About how many moretimes did the damselfly's wings beat in one minute than did thebutterfly's wings?

Answer 1

Damselfly

3minutes the wing beat is 2700times

The wing beat/time ratio is:

`(2700)/(3)=900`

It beats its wings 900times/min

Butterfly

3minutes the wing beat is 2100times

The wing beat/time ratio is

`(2100)/(3)=700`

It beats its wings 700times per minute.

Calculate the difference between both rates:

The Damselfly beats its wings 200times/minute more than the Butterfly