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
Circumference of a circle disc is 88 cm. Its radius is
(a) 8 cm (b) 11 cm (c) 14 cm (d) 44 cm
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
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
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
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
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.
Area of the circle obtained in Question 4 is
(a) 196 cm2 (b) 212 cm2 (c) 616 cm2 (d) 644 cm2
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
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