| 21 |
If the length of a rectangular plot is increased by 20% and the breadth of the plot is reduced by 20%, the area of the plot is decreased by 8 m2. What is the original area of the rectangular plot?
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Answer:
Option (c) |
| 22 |
If the perimeter of a circle is increased by 30%. What will be the effect on the area of the circle?
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Answer:
Option (d) |
| 23 |
If the radius of a sphere increases by 4 cm then the surface area increases by 704 cm2. The radius of the sphere initially was?
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Answer:
Option (a) |
| 24 |
The diameter of a sphere is 8 cm. It is melted and drawn into a wire of diameter 3 mm. The length of the wire is?
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Answer:
Option (b) |
| 25 |
The radii of two cylinders are in the ratio 3 : 2 and their curved surface areas are in the ratio 3 : 5. What is the ratio of their volumes?
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Answer:
Option (d) |
| 26 |
What is the volume of a cylinder whose curved surface area is 1408 cm2 and height is 16 cm?
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Answer:
Option (d) |
