# Chapter 7: Mensuration - Online Test

Q1. The curved surface area of a right circular cone of height 15 cm and base diameter 16 cm is
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Q2. 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
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Q3. The height of a right circular cone whose radius is 5 cm and slant height is 13 cm will be
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Q4. If the radius of the base of a right circular cylinder is halved keeping the same height, then the ratio of the volume of the cylinder thus obtained to the volume of original cylinder is
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Q5. The total surface area of a cylinder whose radius is 1/3 of its height is
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Q6. 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
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Q7. If the radius of the base of a cone is tripled and the height is doubled then the volume is
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Q8. The total surface area of a hemi-sphere is how much times the square of its radius.
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Q9. A solid sphere of radius x cm is melted and cast into a shape of a solid cone of same radius. The height of the cone is
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Q10. A frustum of a right circular cone is of height 16cm with radii of its ends as 8cm and 20cm. Then, the volume of the frustum is
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