CBSE Class 8 Mathematics Mensuration MCQs

Answer: 240 cm²

Question: The adjacent sides of a parallelogram are 8 cm and 9 cm. The diagonal joining the ends of these side is 13 cm. Its area is
a) 12√35 cm²
b) 24√35 cm²
c) 150 cm²
d) 72 cm²

Answer: 12√35 cm²

Question: A square is a special case of
a) rhombus
b) parallelogram
c) isosceles trapezium
d) trapezium

Answer: rhombus

Question: Opposite angles of a rhombus are
a) equal
b) never equal
c) supplementary
d) complementary

Answer: equal

Question: The perimeter of a triangular field is 144 m and the ratio of the sides is 3 : 4 : 5. The area of the field is
a) 864 m²
b) 824 m²
c) 468 m²
d) none

Answer: 864 m²

Question: A rectangular field has its length and breadth in the ratio 5 : 3. Its area is 3.75 hectares. The cost of fencing it at Rs. 5 per meter is
a) Rs. 4000
b) Rs. 500
c) Rs. 400
d) Rs. 1000

Answer: Rs. 4000

Question: If the altitudw of an Equilateral triangle is √6 cm, its area is
a) 2√3 cm²
b) 2√2 cm²
c) 6√2 cm²
d) None of these

Answer: 2√3 cm²

Question: The ratio between the length and the perimeter of a rectangular plot is 1 : 3 and the ratio between the breadth and perimeter of that plot is 1 : 6. What is the ratio between the length and area of that plot?
a) Data inadequate
b) 1 : 6
c) 2 : 1
d) 1 : 8

Answer: Data inadequate

Question: What change in percent is made in the area of a rectangle by decreasing its length and increasing its breadth by 5%?
a) 0.25% decrease
b) 2.5% increase
c) 0.25% increase
d) 2.5% decrease

Answer: 0.25% decrease

Question: The area of a rhombus is 25 cm² and one of its diagonals is 4 cm. Its perimeter is
a) 4√53 cm
b) 2√53 cm
c) 36 cm
d) none of these

Answer: 4√53 cm

Question: The area of a trapezium is 28 cm² and one of its parallel sides 6 cm. If its altitude is 4 cm then its other parallel side is
a) 8 cm
b) 6 cm
c) 4 cm
d) none

Answer: 8 cm

Question: The perimeter of a trapezium is 52 cm and its nonparallel sides are each equal to 10 cm and its altitude is 8 cm. Its area is
a) 128 cm²
b) 118 cm²
c) 112 cm²
d) 124 cm²

Answer: 128 cm²

Question: The area of a rhombus is 120 cm² and its altitude is 10 cm. The length of the rhombus is
a) 12 cm
b) 4 cm
c) 24 cm
d) 8 cm

Answer: 12 cm

Question: The length of diagonal of a square whose area is 16900 m² is
a) 130√2 m
b) 144 m
c) 169 m
d) None of these

Answer: 130√2 m

Question: The sides of a triangle are 3 cm, 5 cm and 4 cm. Its area is
a) 6 cm²
b) 7.5 cm²
c) 17.5 cm2
d) 27.5 cm2

Answer: 6 cm²

Question: The base of an isosceles right triangle is 30 cm. Its are is
a) 225 cm²
b) 225√3 cm²
c) 5√2 cm²
d) None of these

Answer: 225 cm²

Question: One side of an equilateral triangle is 30 cm. Its area is
a) 225√3 cm²
b) 112.5 cm²
c) 225√2 cm²
d) 225 cm²

Answer: 225√3 cm²

Question: The side of a triangle are 16 cm, 30 cm and 34 cm. Its area is
a) None of these
b) 120 cm²
c) 260 cm²
d) 272 cm²

Answer: None of these

Question. What is the area of a rhombus whose diagonals are of lengths 10cm & 8.2 cm?
(i) 24cm² 
(ii) 41 cm² 
(iii) 42 cm² 
(iv) 25 cm²

Question. What is the area of a trapezium whose two parallel sides are 10 cm & 12cm & height 4cm?
(i) 42cm² 
(ii) 44 cm²
(iii) 46 cm² 
(iv) 48 cm²

Question. The area of a rhombus is 240 cm² . If one of its diagonals is 16 cm ,what the length of its other diagonal is?
(i) 32cm
(ii) 30 cm
(iii) 45 cm
(iv) 48 cm

Question. If each side of an equilateral triangle is doubled, then its area becomes how many times?
(i) 2
(ii) 3
(iii) 4
(iv) 8

Question. What is the total surface area of a cuboid of dimensions 4cm, 5cm & 6cm ?
(i) 142cm²
(ii) 144 cm² 
(iii) 146 cm² 
(iv) 148 cm²

Question. What is the lateral surface area of a cube of side 5cm?
(i) 150cm² 
(ii) 100 cm² 
(iii) 140 cm² 
(iv) 130 cm²

Question. What is the volume of a cuboid whose dimensions are 5cm x 3cm x 2cm ?
(i) 24cm³ 
(ii) 20 cm³ 
(iii) 30 cm³ 
(iv) 17 cm³

Question. What is the volume of a sphere whose radius is 3cm ?
(i) 24πcm³ 
(ii) 36π cm³ 
(iii) 30π cm³ 
(iv) 27π cm³

Question. What is the curved surface area of a cone of radius 3cm & height 4 cm?
(i) 14πcm² 
(ii) 15π cm² 
(iii) 16π cm² 
(iv) 17π cm²

Question. If the height of a cylinder is halved, its volume becomes how many times?
(i) 1/ 2
(ii) 1/ 3
(iii) 2
(iv) 3