Question

Long Answer Question : A submarine descended 3/5 of a kilometer in 1/5 of an hour. What was the Submarine's rate of Descent in Kilometers per hour ? Plz show work and explain:)

Answer 1

3 km per hour

Explanation:

You can deduct the answer instinctively since both the distance and the time of the descent are expressed in /5... so you can just get rid of the '/5' in both instances to get the result: 3 kilometers in 1 hour.

But you can also find it easily using the cross-multiplication system:

Then you multiply each side by 5 to get

3 km = 1 hour

Thus the rate of descent is of 3 km per hour.