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A motot boat traveling at 18 miles per h...

A motot boat traveling at 18 miles per hour traveled the length of a lake in one-quarter of an hour less time than it took when travelling at 12 miles per hour. What was the length in miles of the lake?

A

`6`

B

`9`

C

`12`

D

`15`

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The correct Answer is:
To solve the problem, we will follow these steps: ### Step 1: Define the Variables Let the length of the lake be \( D \) miles. Let the time taken to travel the lake at 12 miles per hour be \( T \) hours.
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