Question

The sea floor is 104 feet below sea level. Katy is 28 feet below sea level. She is moving downward at a rate of 4 feet per minute. Colin used the following calculation to determine how long it will take Katy to reach the sea floor. Is he correct? Explain. 104 – 28 ÷ 4 = 97 minutes

Answer 1

The time it will take Katy to reach the sea floor is 19 minutes.

How to find time it will take her to reach a depth?

The time it will take her to reach the sea floor can be calculated as follows:

depth of sea floor = 104 feet

Katy height below sea level = 28 feet

Therefore, she is moving  a downward rate of 4 feet per minute.

The time it will take her to reach the sea floor is as follows;

depth to cover = 104 - 28 = 76

Therefore,

rate = distance / time

4 = 76 / t

cross multiply

4t = 76

t = 76 / 4

t = 19 minutes

Therefore, It will take her 19 minutes to reach the sea floor.

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