#### Mensuration - One Mark Question

10th Standard EM

Reg.No. :
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Maths

Time : 00:30:00 Hrs
Total Marks : 10
10 x 1 = 10
1. The curved surface area of a right circular cone of height 15 cm and base diameter 16 cm is

(a)

60$\pi$ cm2

(b)

68$\pi$ cm2

(c)

120$\pi$ cm2

(d)

136$\pi$ cm2

2. If two solid hemispheres of same base radius r units are joined together along their bases, then curved surface area of this new solid is

(a)

4$\pi$r2 sq.units

(b)

6$\pi$r2 sq.units

(c)

3$\pi$r2 sq.units

(d)

8$\pi$r2 sq.units

3. In a hollow cylinder, the sum of the external and internal radii is 14 cm and the width is 4 cm. If its height is 20 cm, the volume of the material in it is

(a)

5600$\pi$ cm3

(b)

11200$\pi$ cm3

(c)

56$\pi$ cm3

(d)

3600$\pi$ cm3

4. If the radius of the base of a cone is tripled and the height is doubled then the volume is

(a)

(b)

(c)

(d)

unchanged

5. The total surface area of a hemi-sphere is how much times the square of its radius.

(a)

$\pi$

(b)

4$\pi$

(c)

3$\pi$

(d)

2$\pi$

6. The radio of base of a one 5 cm and to height 12cm. The slant height of the cone.

(a)

12cm

(b)

17 cm

(c)

7 cm

(d)

60 cm

7. If S1 denotes the total surface area at a sphere of radius ૪ and S2 denotes the total surface area of a cylinder of base radius ૪and height 2r, then

(a)

S1=S2

(b)

S1>S2

(c)

S1<S2

(d)

S1=2S2

8. A cylinder 10 cone and have there are of a equal base and have the same height. what is the ratio of there volumes?

(a)

3:1:2

(b)

3:2:1

(c)

1:2:3

(d)

1:3:2

(a)

64

(b)

216

(c)

512

(d)

16

10. The volume of a frustum if a cone of height L and ends -radio and r1 and r2 is

(a)

$\frac{1}{3}$πh1(r12+r22+r1r2)

(b)

$\frac{1}{3}$πh(r12+r22-r1r2)

(c)

πh(r12+r22+r1r2)

(d)

πh(r12+r22-r1r2)