Question

A dolphin can swim up to 40 miles per hour. What is this speed in feet per hour?

Answer 1

1 mile = 5280 feet
40 miles = 211200 feet

Answer 2

2,11,200 feet per hour

Explanation:

Given: A dolphin can swim up to 40 miles per hour.

To Find: speed of dolphin in feet per hour.

Solution:

speed of dolphin
`=40`
`\text{miles per hour}`

Now,

`1\text{mile}`
`=5280\text{feet}`

Number of miles traveled by dolphin in
`1\text{hour}`

`=40\text{miles}`

converting speed from miles to feet

`1\text{mile}`
`=5280\text{feet}`

`40\text{miles}=5280*40`

`2,11,200`
`\text{feet}`

speed of dolphin is
`2,11,200`
`\text{feet per hour}`