MCQ: Volume, Surface Area & Solid Figures - 3 - SSC CGL MCQ

Diagonal of the rectangle = √(8² + 6²) = √(64 + 36) = √100 = 10 cm
Hence, Option C is correct.

Surface area of a cuboid = 2 × (lb + bh + hl)
So the answer = 2 × (10 × 8 + 8 × 5 + 5 × 10) = 340 cm²
Hence, Option A is correct.

r³ = 9261
r = 21
Diameter = 21 × 2 = 42 cm
Hence, Option A is correct.

Height of the cylinder = 7 + 4 = 11 cm
Volume of the cylinder = πr²h

Hence, Option C is correct.

Side of the cube = ∛729 = 9 meters
So the answer = Side √3 = 9√3 meters
Hence, Option C is correct.

Curved surface area of a cylinder = 2πrh

Hence, Option B is correct.

2 × (5x + 3x) = 64
8x = 32
x = 4
So the answer = 5x × 3x = 5 × 4 × 3 × 4 = 240 cm²
Hence, Option A is correct.

25 = √(15² + L²)
625 = 225 + L²
400 = L²
20 = L
So the answer = 20 cm
Hence, Option D is correct.

Half the base of the triangle = 12/2 = 6 cm
Height of the triangle = √(10²– 6²) = 8 cm

= 1/2 × 12 × 8 = 48 cm²
Hence, Option D is correct.

Let the width of A = A
Width of B = B

A : B = 5 : 6
Hence, Option B is correct.

Volume of a cylinder = πr²h
So the answer 

Hence, Option D is correct.

6 × side² = 3750
Side² = 625
Sice = 25 cm
So the answer = 25 × 25 × 25 = 15,625 cm3
Hence, Option D is correct.

Area of an equilateral triangle


Hence, Option A is correct.

Perimeter of the rectangle
= 72/2 = 36 cm
Let the width of the rectangle = x
Length = x + 2
2 × (x + x + 2) = 36
2x + 2 = 18
x = 8 cm
Hence, Option A is correct.

6 × side² = 6 × 12 × 12 = 864 m²
Hence, Option B is correct.