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pdf for indian dams

how does online exam take place

how can i set my language to hindi

2+2/2*2.

Height of two cylinders are equal and their radius are in the ratio of 1 : 3 . What will be ratio of volume of both cylinders

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to travel 708km,an express train takes 6 hours more than rajdhani train.if however,the speed of the express train is doubled,it takes 3 hours less than rajdhani train.what is the speed of rajdhani train?

hindi

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Please explain , I think option 2 will be correct