1. Calculate the total surface area of the outside of an open box which has a base measuring 8cm by 4cm and a height of 5cm. 2. The total surface area of a cuboid is 376 sq. m. If the sides are in the ratio 5:4:3, find its dimensions. 3. A rectangular floor is of dimensions 585cm x 690cm. If square tiles of side 15cm are laid, find the number of such square tiles needed for the floor. 4. A room is of dimensions 7.3m (length), 5.4m (width) and 5m (height). Theceiling and the four walls are colour washed at the rate of Rs 12 per m 2 . Find the cost of colour washing. Also, the floor has to be carpeted at the rate ofRs. 55 per sq. m. Find the cost of carpeting the floor. 5. 250 bricks of length 6cm, width 6cm and height 10cm are used to construct a wall. Find the volume of the wall in m 3 . 6. A cuboidal fish tank with the length and width of its base being 50cm and 40cm respectively contains 60 dm 3 of water. What is the height of the water in the fish tank? 7. The area of the base of a cuboid is 45cm 2 . Its height is 6cm. Find the volume. 8. A closed box in the shape of a cube has a total outer surface area of 150cm2. What is the length of its side in centimeters? 9. Four cubes of edge 5cm each are placed side by side and stuck together as shown. If the outer surface alone is painted at Rs 300 per m2, find the cost of painting? 10. A metal block of length 4cm, breadth 3cm and height 2.5cm weighs 500g. What is the mass of a block of length 5cm, breadth 4cm, made of the same metal?
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Calculate the total surface area of the outside of an open box which has a base measuring 8cm by 4cm and a height of 5cm. 2. The total surface area of a cuboid is 376 sq.
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Calculate the total surface area of the outside of an open box which has a base measuring 8cm by 4cm and a height of 5cm. 2. The total surface area of a cuboid is 376 sq.
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