Question

A boat has a speed of 15 mph in calm water. It takes the boat 3 hours to travel upstream but only 2 hours to travel the same
distance downstream. Which equation can be used to find c, the speed of the current in miles per hour?

Answer 1

Answer: 3(15 – c) = 2(15 + c)

Step-by-step explanation:

A boat has a speed in calm water= 15 mph

Time takes the boat  to travel upstream = 3 hours

Time takes the boat  to travel downstream = 2 hours

Let the speed of current represented by c.

Now, upstream speed = 15-c

Downstream speed = 15+c

We know that

Thus, distance covered downstream =

Distance covered downstream =

If they travel the same distance upstream and downstream, then we have  following equation,

3(15 – c) = 2(15 + c)

Answer 2

Answer:

A.  3(15 – c) = 2(15 + c)

Step-by-step explanation:

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