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Gold is 19 times as heavy as water and copper 9 times as heavy as water. The ratio in which these two metals be mixed so that the mixture is 15 times as heavy as water is:
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How many cubes of edges 2dm can be cut out of a meter cube?
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The edge of three cubes of metal is 3dm, 4 dm and 5 dm. They are melted and formed into a single cube. Find the edge of the new cube?
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The slant height of a cone is 12 cm and radius of the base is 4cm, find the curved surface of the cone?
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The ratio between the radii of two spheres is 1:3. Find the ratio between their volumes?
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A man whose speed is 4.5 kmph in water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey?
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An equilateral triangular plate is to be cut into n number of identical small equilateral triangular plates. Which of the following can be possible value of n?
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The average of x1, x2, and x3, is 14. Twice the sum of x2 and x3 is 30. What is the value of x1 ?
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The number of times in a day the hour-hand and the minute-hand of a clock are at right angles, is
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An accurate clock shows the time as 3.00. After hour hand has moved 1350 , the time would be.
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