A series of ocean waves are moving past a surfer at a frequency of 25 waves per hour. approximately how many waves should the surfer expect during 45 minutes?

Question

asked Sep 19, 2019 124k views

1 Answer

Raphie · Answer 1 · 2019-09-24T06:26:05+0000

45 minutes corresponds to
(3)/(4)

of hour. There are 25 waves per hour, so we must find how many waves there are in
(3)/(4)

of hour. Therefore we can write the following proportion:

25 waves: 1h = x : (3)/(4) h

and by solving ,we find

$x= (25 \cdot (3)/(4) )/(1 )=18.75 waves$
So, the surfer should expect almost 19 waves in 45 minutes.