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Chapter 11: Q28. (page 427)

How much will it cost to blacktop the driveway shown if blacktopping costs$11.00per square meter?

Short Answer

Expert verified

The cost to blacktop the driveway is $1122.00

Step by step solution

01

Step 1. Given information.

Cost of blacktopping is$11.00 per square meter.

02

Step 2. Concept  Used.

If b is the base of the reactangle and 102 m2=102×11=$1122.00is the height of the rectangle.

Then, the area of the rectangle isA=b×h

03

Step 3. Let’s calculate the area of the path.

Total area of the driveway = Area of first part + Area of second part

i.e.

Area of first partlength=(18−12)=6 mwidth=(9−4)=5 mA1=bhA1=6(5)=30  m2

Area of second partA2=bhA2=4(18)=72  m2

Now, total area isA1+A2=30+72=102 m2

Cost of blacktopping per meter square =$11.00

Cost of blacktopping is,102 m2=102×11=$1122.00

Therefore, the cost of blacktopping is$1122.00

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Most popular questions from this chapter

Consecutive sides of the figures are perpendicular. Find the area of each figure.

a. Think of a parallelogram made with cardboard strips and hinged at each vertex so that the measure of∠C will vary. Find the area of the parallelogram for each measure of∠C given30.

b. Think of a parallelogram made with cardboard strips and hinged at each vertex so that the measure of∠C will vary. Find the area of the parallelogram for each measure of∠C
given 45.

c. Think of a parallelogram made with cardboard strips and hinged at each vertex so that the measure of ∠Cwill vary. Find the area of the parallelogram for each measure of∠C given 60.

d. Think of a parallelogram made with cardboard strips and hinged at each vertex so that the measure of∠C will vary. Find the area of the parallelogram for each measure of∠C given 90.

e. Think of a parallelogram made with cardboard strips and hinged at each vertex so that the measure of∠C will vary. Find the area of the parallelogram for each measure of∠C given120.

Approximate your answers to parts (b), (c) and (e) using2≈1.4 and3≈1.7. Then record your answers to parts (a)-(c) on a set of axes like the one below.
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