Answer:
Part 1) The length of the terrace is 15 feet
Part 2) The width of the terrace is 6 feet
Part 3) The area of the terrace is 90 square feet
Step-by-step explanation:
<u><em>The picture of the question in the attached figure </em></u>
we know that
The scale of the plan is 
step 1
Find the length of the terrace
we know that
The length of a terrace in the plan is equal to 5 inches
so
by proportion
Find the length of the terrace in the actual

step 2
Find the width of the terrace
we know that
The width of a terrace in the plan is equal to
so
by proportion
Find the width of the terrace in the actual

step 3
Find the area of a terrace
we know that
The area of a terrace is equal to

we have

substitute
