Find the length of a rectangular lot with a perimeter of 126 meters if the length is 7 meters more than the width.

Let, the width = x

length = x+7

Now, 2(x+7+x) = 126

2(2x+7)=126

4x+14 = 126

4x = 112

x = 28

So, length would be(x+7) = 28+7 = 35meters

see explanation (please confirm if I read you problem correctly)

Step-by-step explanation:

150 kilometers

60 kph

tank is 20 liters

6 km/l

150/6 = 25 liters needed

$60/l

you will need to get 5 more liters of fuel

total cost 25 x .60 =  $15