Area of circular garden with diameter 8 m is (a) 12.56 m2 (b) 25.12 m2 (c) 50.24 m2 (d) 200.96 m2
The correct answer is (c) 50.24 m2 Solution We know that, area of circle = πr2 Diameter = 8m Then,... View Article
Latest Posts
Length of tape required to cover the edges of a semicircular disc of radius 10 cm is (a) 62.8 cm (b) 51.4 cm (c) 31.4 cm (d) 15.7 cm
The correct answer is (b) 51.4 cm Solution From the given details we note that, Radius of semicircular disc 10... View Article
Circumference of a circle disc is 88 cm. Its radius is (a) 8 cm (b) 11 cm (c) 14 cm (d) 44 cm
The correct answer is (c) 14 cm Solution From the given details we note that, Circumference of a circle =... View Article
Circumference of a circle of diameter 5 cm is (a) 3.14 cm (b) 31.4 cm (c) 15.7 cm (d) 1.57 cm
The correct answer is (c) 15.7 cm Solution From the given details we note that, diameter = 5 cm Radius... View Article
Area of a right-angled triangle is 30 cm2. If its smallest side is 5 cm, then its hypotenuse is (a) 14 cm (b) 13 cm (c) 12 cm (d) 11cm
The correct answer is (b) 13 cm Solution From the given details we note that, We know that, area of... View Article
In figure ∆ MNO is a right-angled triangle. Its legs are 6 cm and 8 cm long. Length of perpendicular NP on the side MO is (a) 4.8 cm (b) 3.6 cm (c) 2.4 cm (d) 1.2 cm
The correct answer is (a) 4.8 cm Solution From the given details we note that, ∆ MNO is a right-angled... View Article
In figure if PR = 12 cm, QR = 6 cm and PL = 8 cm, then QM is (a) 6 cm (b) 9 cm (c) 4 cm (d) 2 cm
The correct answer is (c) 4 cm Solution From the given details we note that, PR = 12 cm QR... View Article
Area of triangle PQR is 100 cm2 (figure). If altitude QT is 10 cm, then its base PR is (a) 20 cm (b) 15 cm (c) 10 cm (d) 5 cm
The correct answer is (a) 20 cm Solution We know that, area of triangle = ½ × base × height... View Article
Circumference of a circle is always (a) more than three times of its diameter (b) three times of its diameter (c) less than three times of its diameter (d) three times of its radius
The correct answer is (a) more than three times of its diameter Solution The different methods to calculate the diameter... View Article
In reference to a circle the value of π is equal to (a) area/circumference (b) area/diameter (c) circumference/diameter (d) circumference/radius
The correct answer is (c) circumference/diameter Solution We know that, circumference of circle = 2πr Then, π = circumference/2r Hence,... View Article
In figure EFGH is a parallelogram, altitudes FK and FI are 8 cm and 4cm respectively. If EF = 10 cm, then area of EFGH is (a) 20 cm2 (b) 32 cm2 (c) 40 cm2 (d) 80 cm2
The correct answer is (c) 40 cm2 Solution From the figure we observe that Let us consider the parallelogram EFGH,... View Article
Ratio of areas of ∆MNO, ∆MOP and ∆MPQ in figure is (a) 2 : 1 : 3 (b) 1 : 3 : 2 (c) 2 : 3 : 1 (d) 1 : 2 : 3
The correct answer is (a) 2 : 1 : 3 Solution From the formula we know that, area of triangle... View Article
Ratio of area of ∆MNO to the area of parallelogram MNOP in the same figure 9.17 is (a) 2 : 3 (b) 1 : 1 (c) 1 : 2 (d) 2 : 1
The correct answer is (c) 1 : 2 Solution From the formula we know that, area of triangle = 1/2 (base... View Article
Area of triangle MNO of figure is (a) ½ MN × NO (b) ½ NO × MO (c) ½ MN × OQ (d) ½ NO × OQ
The correct answer is (d) ½ NO × OQ Solution MNO is a triangle. From the formula we know that,... View Article
Area of parallelogram ABCD (figure) is not equal to (a) DE × DC (b) BE × AD (c) BF × DC (d) BE × BC
The correct answer is (a) DE × DC Solution From the formula area of parallelogram = base × corresponding height... View Article
Area of shaded portion in figure is (a) 25 cm2 (b) 15 cm2 (c) 14 cm2 (d) 10 cm2
The correct answer is (d) 10 cm2 Solution From the given details we observe that The dimensions of rectangle Length... View Article
Area of a rectangle and the area of a circle are equal. If the dimensions of the rectangle are 14cm × 11 cm, then radius of the circle is (a) 21 cm (b) 10.5 cm (c) 14 cm (d) 7 cm.
The correct answer is (d) 7 cm Solution From the given details we observe that The dimensions of rectangle length... View Article
Area of the circle obtained in Question 4 is (a) 196 cm2 (b) 212 cm2 (c) 616 cm2 (d) 644 cm2
The correct answer is (c) 616 cm2 Solution We know that, area of the circle = πr2 = (22/7) ×... View Article
A wire is bent to form a square of side 22 cm. If the wire is rebent to form a circle, its radius is (a) 22 cm (b) 14 cm (c) 11 cm (d) 7 cm
The correct answer is (b) 14 cm Solution From the given details we note that The side of square is 22... View Article
36 unit squares are joined to form a rectangle with the least perimeter. Perimeter of the rectangle is (a) 12 units (b) 26 units (c) 24 units (d) 36 units
The correct answer is (b) 26 units Solution From the given details we note that area of rectangle = 36 units2... View Article
