Question

A diver is exploring the waters of the Great Barrier Reef.

Answer 1

Answer:

• 8 3/4 minutes
• 30 minutes

Step-by-step explanation:

Part A

The change in depth from -5 ft to -75 ft is ...

  -75 -(-5) = -70 ft

At the rate of -8 ft/min, it will take this long to reach the desired depth:

  time = distance/speed

  = (-70 ft)/(-8 ft/min) = 70/8 min = 8 3/4 min

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Part B

Ascending from -75 ft to 0 ft at the rate of 5 ft/min will take ...

  time = distance/speed

  = (0 -(-75 ft))/(5 ft/min) = 75/5 min = 15 min

Adding a 15 minute rest will bring the total travel time to ...

  (15 min) + (15 min) = 30 min