Everything Maths Grade 10

19.Consider the solids below and answer the questions that follow (correct to 1 decimal place, if necessary):

4 cm

10 cm

20 cm

8 cm

3 cm

5 cm

4 cm

2 cm

5 cm

a)Calculate the surface area of each solid.

b)Calculate volume of each solid.

c)If each dimension of the solids is increased by a factor of 3, calculate the new surface area of each

solid.

d)If each dimension of the solids is increased by a factor of 3, calculate the new volume of each solid.

20.The solid below is made of a cube and a square pyramid. Answer the following:

7 cm

22 cm

a)Find the surface area of the solid shown. Give your answers to two decimal places.

b)Now determine the volume of the shape. Give your answer to the nearest integer value.

21.Calculate the volume and surface area of the solid below (correct to 1 decimal place):

50 cm

40 cm

30 cm

462 13.5. Chapter summary