A school room is be built to accommodate 70 children so as to allow 2.2 m2 of floor ...
View QuestionA rectangular paper of 44 cm long and 6 cm wide is rolled to form a cylinder of height equal to width of the paper. The radius of the base of the cylinder so rolled is :
a) 3.5 cm b) 5 cm c) 7 cm d) 14 cm Answer: c Explanation: Length of ...
View QuestionThe radius of base and curved surface area of a right cylinder is ‘r’ units and 4πrh square units respectively. The height of the cylinder is :
The radius of base and curved surface area of a right cylinder is 'r' units and 4πrh square ...
View QuestionThe dimensions of a rectangular box are in the ratio 2 : 3 : 4 and the difference between the cost of covering it with sheet of paper at the rate of Rs. 8 and Rs. 9.50 per square metre is Rs. 1248. Find the dimensions of the box in metres.
a) 2 m, 12 m, 8 m b) 4 m, 9 m, 16 m c) 8 m, 12 m, 16 ...
View QuestionFrom a cube of side 8 m, a square hole of 3 m side is hollowed from end to end. What is the volume of the remaining solid ?
a) 440 m3 b) 480 m3 c) 508 m3 d) 520 m3 Answer: a Explanation: Volume of the remaining ...
View QuestionA closed box made of wood of uniform thickness has length, breadth and height 12 cm, 10 cm and 8 cm respectively. If the thickness of the wood is 1 cm, the inner surface area is :
a) 264 cm2 b) 376 cm2 c) 456 cm2 d) 696 cm2 Answer: b Explanation: LInternal length = (12 ...
View QuestionThe breadth of a room is twice its height and half its length. The volume of the room is 512 cu.m. The length of the room is :
a) 16 m b) 18 m c) 20 m d) 32 m Answer: a ...
View QuestionA patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to serve 250 patients ?
a) 38L b) 40L c) 39.5L d) 38.5L Answer: d Explanation: Diameter of bowl = 7 cm Radius ...
View QuestionV1, V2, V3 and V4 are the volumes of four cubes of side lengths x cm, 2x cm, 3x cm and 4 cm respectively. Some statements regarding these volumes are given below :
V1, V2, V3 and V4 are the volumes of four cubes of side lengths x cm, 2x cm, ...
View QuestionAn open box is made by cutting the congruent squares from the corners of a rectangular sheet of cardboard of dimension 20 cm × 15 cm. If the side of each square is 2 cm, the total outer surface area of the box is :
An open box is made by cutting the congruent squares from the corners of a rectangular sheet of ...
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