Members of an art club paint a mural on a large wall that is shaped like a trapezoid. One base of the trapezoid is 20 feet long and the other base is half that length. A gallon of the paint they use covers 300 square feet. They use all but 1/5

of one gallon of the paint. What is the height of the wall? Complete the explanation.

The height of the wall is 4 feet.

Step-by-step explanation:

Given data:

one base=a=20 feet

second base=b=half of base a=1/2 x 20=10 feet

A gallon of the paint they use covers 300 square feet and they use 1/5 of one gallon so,

Area of trapezoid=A=1/5 of 300= 1/5 x 300=60 square feet

Required:  

What is the height of the wall?

Solution:

As we know the formula for area of a trapezoid is;

putting values, we get

The height of the wall is 4 feet.

Height of the wall is 4 feet

Step-by-step explanation:

A look at the image attached will provide the necessary explanations

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step-by-step explanation:

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