Question

ume and Surface Area of Solids
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width of the beam?
the room.
17. mibeam of wood is 5 m long and 36 cm thick. It is made of 1.35 m of wood. What is the
18. The volume of a room is 378 m and the area of its floor is 84 m². Find the height of
19. A swimming pool is 260 m long and 140 m wide. If 54600 cubic metres of water is pumped
into it, find the height of the water level in it.
20. Find the volume of wood used to make a closed box of outer dimensions
60 cm x 45 cm x 32 cm , the thickness of wood being 2.5 cm all around.
21. Find the volume of iron required to make an open box whose external dimensions are
36 cm x 25 cm x16.5 cm, the box being 1.5 cm thick throughout. If 1 cm of iron weighs
8.5 grams, find the weight of the empty box in kilograms.
22. A box with a lid is made of wood which is 3 cm thick. Its external length, breadth and height
are 56 cm, 39 cm and 30 cm respectively. Find the capacity of the box. Also find the volume
of wood used to make the box.
23. The external dimensions of a closed wooden box are 62 cm, 30 cm and 18 cm. If the box is
made of 2-cm-thick wood, find the capacity of the box.
24. A closed wooden box 80 cm long, 65 cm wide and 45 cm high, is made of 2.5-cm-thick
wood. Find the capacity of the box and its weight if 100 cm of wood weighs 8 g.
25. Find the volume, lateral surface area and the total surface area of a cube each of whose
edges measures: (1) 7 m (ii) 5.6 cm (iii) 8 dm 5 cm
26. The surface area of a cube is 1176 cm. Find its volume.
27.
The volume of a cube is 720 m 3
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Answer 1

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Answer 2

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