The curved surface of a solid cylinder is $2\over 3$ rd of its total surface and total surface area is$231 m^ 2$ , then the volume of cylinder is

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2 .

In an examination 70% students passed in English, 65% passed in Maths, 27% failed in both the subjects and 248 students passed in both the subjects. Find the total number of students

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3 .

Two trains are moving in the same direction at 75 km/hr and 48 km/hr. The faster train crosses a man sitting in the slower in 14 seconds. Find the length of faster train

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4 .

The simplified value of $ (secA - cosA)^ 2$ + $(cosecA - sinA)^ 2$ -$ (cotA - tanA)^ 2$ is

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5 .

A certain number of men complete a piece of work in 60 days. If there are 8 men more, the work could be finished in 10 days less. The number of men originally were

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6 .

After allowing a discount of 10% on marked price a trader makes a profit of 15%. The ratio of the marked price to the cost price is

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7 .

80 litres of a mixture contain milk and water in the ratio 27 : 5. How much more water is to be added to get a mixture containing milk and water in the ratio of 3 : 1 ?

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8 .

If the radius of the base of cone be 7 cm and its surface area be 550 $cm^2$ , then the volume of the cone is

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9 .

Mohan lends Rs. 500 to John and a certain sum to Tom at the same time at a S.I. of 8% per annum. If in 4 years, he altogether receives Rs. 210 as interest from the both, then how much the sum of money he lent to Tom?

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10 .

Sriya with her family travelled from Bolpur to Suri by car of a speed of 40 km/hr and returned to Bolpur at a speed of 50 km/hr. The average speed for the whole journey is

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