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\\November 22, 2023 5:10 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

7. Find the perimeter and area of the following figure.
A 5 cm B

5 cm
9 cm
C D
L K
3 cm
7 cm
E F
J I
9 cm
3 cm

H G
3 cm
8. How many unit cubes are to be added in the given solid to get a cube
of dimensions 5 × 5 × 5?

9. If the volume of a cuboid is 3000 cu. m and the area of the base of the
cuboid is 300 sq m, find the height of the cuboid.
10. A shoe box has a base of area 1360 sq. cm. Its height is 12 cm. Find the volume of
the box.

11. The volume of a cuboid is five times the volume of a cube having edge 10 m. Find
the volume of the cuboid.
12. Two-thirds of the height of a cubical fish tank is filled with water. If the length of the
tank is 60 cm, breadth is 30 cm and the height is 45 cm, then find the volume of the

unfilled portion of the tank.
13. How many bricks of size 15 cm × 6 cm × 3 cm will be needed to build a wall of size
45 m × 12 m × 5 m?

14. Siya’s lunch box is 10 cm long, 8 cm wide and 6 cm high. Swati’s lunch box is 12 cm
long, 9 cm wide and 4 cm high. Whose lunch box is bigger in size?

Brain Sizzlers

1. A plastic box has a dimensions of 10 cm, 3 cm and 5 cm. If 1 cubic cm can hold 5
grams of sugar, find the weight of sugar that the box can hold.

2. A rectangular table cloth measures 80 cm by 40 cm. When spread on the table, it
leaves a margin of 8 cm all around. Find the area of the table not covered by the
cloth (margin).

230 Mathematics-5