MCQ: Volume, Surface Area & Solid Figures - 1 - SSC CGL MCQ

Length of the rectangle = 5x
Breadth of the rectangle = 4x
5x × 4x = 320
x² = 16
x = 4
So the answer = 2 × (5x + 4x) = 2 × 9x = 2 × 9 × 4 = 72 cm
Hence, Option B is correct.

The side of the square must be the same as the breadth of the rectangle.
Side of the square = 4 meters
So the answer = 4 × 4 = 16 m²
Hence, Option D is correct.

Volume of the cylinder = πr²h

Hence, Option B is correct.

Height of an equilateral triangle

Hence, Option A is correct.

Perimeter of a semicircle = πr + 2r

Hence, Option D is correct.

Diameter of the circle = breadth of the rectangle = 42 meters
Radius of the circle

So the answer 

Hence, Option D is correct.

The total surface area of a cylinder = 2πrh + 2πr² = 2πr(h + r)

Hence, Option D is correct.

(The volume of cube = side³)
The ratio of sides = ∛8 : ∛27 = 2 : 3
Hence, Option B is correct.

Perimeter of the wheel

Hence, Option B is correct.

Let the widh = 2x
Length = 3x
2x × 3x = 54
x = 3 cm
Hence, Option A is correct.

Side of the square = √144 = 12 cm

So the answer = π × 3 × 3 = 9π cm² 

πr² + 2πr = 704
πr(r + 2) = 704

r × (r + 2) = 224
r = 14
So the answer

Hence, Option C is correct.

Height of the triangle = √(13² – 12²) = 5 meters


Hence, Option A is correct.

Volume of the cylinder = πr²h = 1232


Hence, Option A is correct.

Diagonal of a room = √(l² + b² + h²)
So the answer = √(20² + 10² + 20²) = √900 = 30 meters
Hence, Option B is correct.