Maths : Mensuration: Book Back, Exercise, Example Numerical Question with Answers, Solution: Exercise 7.2: Surface Area of Cuboid and Cube

**Surface Area of Cuboid and Cube**

**Exercise 7.2**

**1. Find the Total Surface Area and the
Lateral Surface Area of a cuboid whose dimensions are: length = 20 cm, breadth
= 15 cm and height = 8 cm**

**2. The dimensions of a cuboidal box are
6 m Ã— 400 cm Ã— 1.5 m. Find the cost of painting its entire
outer surface at the rate of â‚¹22 per m^{2}.**

**3. The dimensions of a hall is 10 m
Ã— 9 m Ã— 8 m. Find the cost of white washing the walls and ceiling
at the rate of â‚¹8.50 per m^{2}.**

**4. Find the TSA and LSA of the cube whose
side is (i) 8 m (ii) 21 cm (iii) 7.5 cm**

**5. If the total surface area of a cube
is 2400 cm^{2} then, find its lateral surface area.**

**6. A cubical container of side 6.5 m
is to be painted on the entire outer surface. Find the area to be painted and the
total cost of painting it at the rate of â‚¹24 per m^{2}.**

**7. Three identical cubes of side 4 cm
are joined end to end. Find the total surface area and lateral surface area of the
new resulting cuboid.**

Tags : Numerical Problems with Answers, Solution | Mensuration | Maths , 9th Maths : UNIT 7 : Mensuration

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9th Maths : UNIT 7 : Mensuration : Exercise 7.2: Surface Area of Cuboid and Cube | Numerical Problems with Answers, Solution | Mensuration | Maths

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