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9th CBSE
IMPORTANT
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Find the length of the longest pole that can be put in a room of dimensions 10 m×10 m×5 m.

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Important Questions on Volume and Surface Area of Solids

MEDIUM
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15A>Q 24
The sum of length, breadth and depth of a cuboid is 19 cm and the length of its diagonal is 11 cm. The surface area of the cuboid is k cm2. Find k.
MEDIUM
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15A>Q 25
Each edge of a cube is increased by 50%. Find the percentage increase in the surface area of the cube.
EASY
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15A>Q 26
If V is the volume of a cuboid of dimensions a, b, c and S is its surface area then prove that 1V=2S1a+1b+1c.
MEDIUM
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15A>Q 27
Water in a canal, 30 dm wide and 12 dm deep, is flowing with a velocity of 20 km per hour. If 9 cm of standing water is desired, then the area irrigated in 30 minutes will be in the form of k m2. Find the value of k.
MEDIUM
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15A>Q 28
A solid metallic cuboid of dimensions (9 m×8 m×2 m) is melted and recast into solid cubes of edge 2 m. Find the number of cubes so formed.
EASY
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 1

The diameter of a cylinder is 28 cm and its height is 40 cm. Find the curved surface area, total surface area and the volume of the cylinder.

MEDIUM
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 2
 A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup (in litres) the hospital has to prepare daily to serve 250 patients? [Take π=227].
EASY
9th CBSE
IMPORTANT
Secondary School Mathematics FOR CLASS 9>Chapter 15 - Volume and Surface Area of Solids>EXERCISE 15B>Q 3
The pillars of a temple are cylindrically shaped. Each pillar has a circular base of radius 20 cm and height 10 m. Concrete mixture would be required to build 14 such pillars is k.6 m3. Find k. [Take π=227]