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(78 Posts)

By sarabjeet kaur Share

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Mridul

Posted on Aug 10, 2013 10:39 AM

A ball is bouncing elastically with a speed 1 m/s between walls of a railway compartment of size 10 m in a direction perpendicular to walls. The train is moving at a constant velocity of 10 m/s parallel to the direction of motion of the ball. As seen from the ground, (a) the direction of motion of the ball changes every 10 seconds. (b) speed of ball changes every 10 seconds. (c) average speed of ball over any 20 second interval is fixed. (d) the acceleration of ball is the same as from the train.

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Shalabh Kushwaha

Posted on Apr 27, 2013 12:36 PM

A and b are consecutive, positive integers such that a2−b2>22. What is the minimum possible value of a+b?

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Jahiruddin

Posted on Apr 12, 2013 11:58 AM

Let X={1,2,3,4,5}.the number of different ordered pairs (y,z) that can formed such that y⊆X, z⊆X and y⋂z is empty,is (a)5^2 (b)3^5 (c)2^5 (d)5^3

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Tushar Sukhija

Posted on Apr 02, 2013 10:18 PM

Chapter wise weightage for aieee

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Urmi

Posted on Feb 27, 2013 10:50 AM

Integration of sin2x/sin^3x+cos^3x dx

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