Question

A stone fell from the top of a cliff into the ocean.

In the air, it had an average speed of 16 m/s. In the water, it had an average speed of 3 m/s before hitting the seabed. The total distance from the top of the cliff to the seabed is 127 meters, and the stone's entire fall took 12 seconds.
How long did the stone fall in the air and how long did it fall in the water?

The stone fell in the air for ___seconds and fell in the water for ___ seconds.

Answer 1

The stone fell in the air for 7 seconds and fell in the water for 5 seconds.

Explanation:

time taken in water is 12 - 7 = 5 seconds

checking; 16*7 + 3*5 = 127 (proven