a) $$\frac{{\sqrt 3 + 2\sqrt {13} }}{4}sq.m$$ b) $$\frac{{\sqrt 3 + 3\sqrt {13} }}{4}sq.m$$ c) $$\frac{{\sqrt 3 + 3\sqrt ...
View QuestionThe external and internal diameters of a hemispherical bowl are 10 cm and 8 cm respectively. What is the total surface area of the bowl ?
a) 257 cm2 b) 286 cm2 c) 292 cm2 d) 302 cm2 Answer: b Explanation: Internal radius, r = ...
View QuestionThe diameter of a spare is 8 cm. It is melted and drawn into a wire of diameter 3 mm. The length of the wire is :
a) 36.9 m b) 37.9 m c) 38.9 m d) 39.9 m Answer: b Explanation: Let the length of ...
View QuestionThe curved surface area of a sphere is 5544 sq.cm. Its volume is :
a) 22176 cm3 b) 33951 cm3 c) 38808 cm3 d) 42304 cm3 Answer: c Explanation: $$\eqalign{ & 4\pi ...
View QuestionA right circular cone and a right circular cylinder have equal base and equal height. If the radius of the base and the height are in the ratio 5 : 12, then the ratio of the total surface area of the cylinder to that of the cone is :
a) 3 : 1 b) 13 : 9 c) 17 : 9 d) 34 : 9 Answer: c Explanation: ...
View QuestionThe curved surface of a right circular cone of height 15 cm and base diameter 16 cm is :
a) 60π cm2 b) 68π cm2 c) 120π cm2 d) 136π cm2 Answer: d Explanation: h = 15 cm, ...
View QuestionWater is poured into an empty cylindrical tank at a constant rate for 5 minutes. After the water has been poured into the tank. the depth of the water is 7 feet. The radius of the tank is 100 feet. Which of the following is the best approximation for the rate at which the water was poured into the tank ?
a) 140 cubic feet/sec b) 440 cubic feet/sec c) 700 cubic feet/sec d) 2200 cubic feet/sec Answer: c ...
View QuestionThe height of a closed cylinder of given volume and the minimum surface area is :
a) Equal to its diameter b) Half of its diameter c) Double of its diameter d) None of these Answer: ...
View QuestionThe curved surface area of a cylindrical pillar is 264 m^2 and its volume is 924 m^3. Find the ratio of its diameter to its height.
The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find ...
View QuestionIf three equal cubes are placed adjacently in a row, then the ratio of the total surface area of the new cuboid to the sum of the surface areas of the three cubes will be ?
a) 1 : 3 b) 2 : 3 c) 5 : 9 d) 7 : 9 Answer: d Explanation: ...
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