A contractor is pouring a concrete driveway. The perimeter is 108 ft. What length will the driveway be if the width is 12. How long is the driveway?

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Answer 1 · 2017-01-06T04:43:28

The length of the driveway is #42ft#.

Since the driveway is rectangular, the perimeter will be calculated as twice the sum of its length and width. Hence:

#p=2(l+w)#

Since we know #p# and #w#, we substitute the values and calculate the length.

#p=2(l+w)#

#108=2(l+12)#

Divide both sides by #2#.

#54=l+12#

Subtract #12# from both sides.

#42=l#