Question

a sailboat started its journey at 6:30 am and reached the destination at 11:45pm. If the distance of the journey is 1276.5 miles, what is the sailboats average speed

Answer 1

74 mph

Explanation:

we know that

To find out the average speed, divide the total distance by the total time

Let

s ----> the speed in mph

d ---> the distance in miles

t ----> the time in hours

so

`s=(d)/(t)`

step 1

Find the total time

A sailboat started his journey at 6:30 am and reached his destination at 11:45 pm

so

from 6:30 am to 12:00 pm ----> there are 5 hours + 30 minutes=5.5 hours

from 12:00 pm to 11:45 pm ----> there are 11 hours + 45 minutes=11.75 hours

The total time is

`5.5+11.75=17.25\ hours`

step 2

Find the average speed

`s=(d)/(t)`

we have

`d=1,276.5\ mi`

`t=17.25\ hours`

`s=(1,276.5)/(17.25)= 74\ mph`