Related InterviewSolutions

• A cone of radius 8 cm and height 12 cm is divided into two parts by a plane through the mid-point of its axis parallel to its base Find the ratio of the volumes of two parts
• If volume of two spheres are in the ratio 64: 27, then the ration of their surface area isA. `3:4`B. `4:3`C. `9:16`D. `16:9`
• If volumes of two spheres are in the ratio 64:27 then the ratio of their surface areas is
• The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.
• A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of Rs 16 per`100 cm^2`.
• Rasheed got a playing top (lattu) as his birthday present, which surprisingly had no colour on it. He wanted to colour it with his crayons. The top is shaped like a cone surmounted by a hemisphere. The entire top is 5 cm in height and the diameter of the top is 3.5 cm. Find the area he has to colour.
• Savitri had to make a model of a cylindrical kaleidoscope for her science project. She wanted to use chart paper to make the curved surface of the kaleidoscope. (see Fig 13.10). What would be the area of chart paper required by her, if she wanted
• Mary wants to decorate her Christmas tree. She wants to place the tree on a wooden box covered with coloured paper with picture of Santa Claus on it (see Fig. 13.4). She must know the exact quantity of paper to buy for this purpose. If the box has length, breadth and height as 80 cm, 40 cm and 20 cm respectively how many square sheets of paper of side 40 cm would she require?
• A solid cylinder of radius r and height h is palced over other cylinder same height and radius . The total surface area of the shape so formed is `4pirh + 4 pir^(2)`.
• During conversion of a solid from one shape to another, the volume the new shape willA. increaseB. decreaseC. remainD. be doubled