Q. A substance used in metallurgy to remove rock material is called

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Q 1. When two pipes work together, then a tank can be filled in 12 hours. One pipe fills the tank comparatively 10 hours faster than the other pipe. How much time will the pipe which is faster take to fill the tank?

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Q 2. A boy goes from home to school at the rate of 3 km./hr. and come back from school to home at the speed of 2 km./hr. If he takes five hours in coming and going, then what is the distance between home and school?

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Q 3. A man rows a boat at the speed of 6 km./hr. in still water. When the river flows with the speed 1.2 km./hr, then it takes 1 hour for the man to row from one place to another. How far is that place?

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Q 4. Find out the area of a triangle whose sides are 50m., 78m., and 112m.?

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Q 5. If the length of a rectangle is reduced by 20%, then by what percent should its width be increased so that the area does not increase?

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Q 6. A train 110 metres long is travelling at the speed of 60 km. per hr. How long will it take to cross a man walking in the direction opposite to the train, at the speed of 6 km./hr.?

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Q 7. 35, 24, 15, 8……………….

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Q 8. 6 days from today, it will be 20th of the month, then what was the date/day before yesterday?

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Q 9. If in a code language SYSTEM is written as SYSMET and NEARER is written as AENRER, then how will FRACTION be written?

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Q 10. If by reducing 7 from a number, we get square of 9, then what will be smallest number?

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