Question

5. A blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12

hours 22 minutes. Which is closest to the calf's average rate of speed, in feet per hour?

Answer 1

The average speed is 97346 feet per hour approximately

Solution:

Given that blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12 hours 22 minutes

To find: average rate of speed in feet per hour

The speed is given by formula:

`speed = (distance)/(time)`

From given information,

`distance = 228 \text{ miles }`

`time = 12 \text { hours } 22 \text{ minutes }`

We know that,

`1 \text{ minute } = (1)/(60) \text{ hour}`

Therefore,

`12 \text { hours } 22 \text{ minutes } = 12 + (22)/(60) \text{ hour } = 12.3667 \text{ hour }`

Substituting the values in above formula,

`\text { speed }=(228)/(12.3667)=18.4366`

Thus average speed is 18.4366 miles per hour

Let us convert to feet per hour

We know that,

1 mile = 5280 feet

Therefore,

18.4366 miles = 18.4366 x 5280 feet = 97345.248 feet

Thus average speed is 97346 feet per hour approximately