Everything Maths Grade 10

SOLUTION

Step 1: Sketch and label the net of the cylinder

10 cm

30 cm

Step 2: Find the area of the different shapes in the net

area of large rectangle=circumference of circlelength

= 2rl

= 2(10) 30

=1884,9555... cm^2

area of circle=r^2

=(10)^2

=314,1592... cm^2

surface area=area large rectangle+ (2area of circle)

=1884,9555...+ 2 (314,1592...)

=2513,3 cm^2

Step 3: Write the final answer

The surface area of the cylinder is 2513,3 cm^2.

Exercise 13 – 2:

1.Calculate the surface area of the following prisms:

a)

6 cm

10 cm

7 cm

Chapter 13. Measurements 425