The diagonal of a cube is m. Find the surface area of cube :
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Solution
Side = 5 m
∴ Surface area = 6 × 5 × 5 = 150 m2
Find the volume of a cuboid 16 m long, 14 m broad and 7 m high :
Find the number of iron balls, each 1 cm in diameter that can be made from a sphere of radius 6 cm :
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Solution
Number of balls =
Find the slant height of a cone of radius 21 cm and height 28 cm :
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Solution
Slant height =
How many cylindrical iron rods, each of length 7 m and diameter 2 cm can be made out of 0.88 cubic meter of iron ?
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Solution
Number of rods =
A train 360 m long is running at a speed of 90 km/hr. In what time will it pass a bridge 140 m long ?
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Solution
Time =
A shopkeeper sells two watches for Rs. 300 each. On one he gets 12% profit and on the other 12% loss. His profit or loss in the entire transaction was :
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Solution
Loss % =
A man buys an article for Rs. 65 and sells it for Rs. 78. Find his gain percent :
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Solution
Profit % =
Some articles were bought at 6 for Rs. 5 and sold at 5 for Rs. 6. Gain percent is :
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Solution
Gain percent = = 44
A man bought some fruits at the rate of 16 for Rs. 24 and sold them at the rate of 8 for Rs. 18. What is the profit percent ?
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Solution
Cost price of 8 fruits = Rs. 12
∴ % Profit =