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In one fortnight of a given month,there was a rainfall of 10 cm in a river valley.If the area of the vally is `7280km^2`,show that the total rainfall was approximately equivalent to the addition to the normal water of three rivers each 1072 km long.75m wide and 3m deep.

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R G PUBLICATION-SURFACE AREA AND VOLUMES-EXERCISE
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  2. A right triangle whose sides are 3 cm and 4 am (other than hypotenuse)...

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  3. In one fortnight of a given month,there was a rainfall of 10 cm in a r...

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  4. An oil funnel made of tin sheet consists of a 10cm long cylindrical po...

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  5. The surface area of a sphere is 616cm^2.Find its radius.

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  6. A cylinder,a cone and a hemisphere are of equal base and have the same...

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  7. A cylinder and a cone are of the same base radius and of some height.F...

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  8. A sphere and a cube have equal surface areas.What is the ratio of the ...

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  9. The radii of two cones are in the ratio 2:1 and their volumes are equa...

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  10. The radii of the bases of a cylinder and a cone are in the ratio 3:4 a...

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  11. Two cones height are in the ratio 1:3 and radii 3:1.What is the ratio ...

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  12. Two cubes have their volumes in the ratio 1:27.What is the ratio of th...

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  13. A sphere of maximum volume is cut out from a solid hemisphere of radiu...

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  14. What is the ratio of the volume of a cube to that of a sphere which wi...

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  15. If the slant height of the frustum of a cone is 5 cm.If the difference...

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  16. The slant height of the frustrum of a cone is 5cm.If the difference be...

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  17. A cylindrical pencil sharpened at one edge is the combination of

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  18. A funnel is the combination of

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  19. A plumbine is the combination of

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  20. A cone is cut by a plane parallel to its base and the upper part is re...

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