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# if the sum of first n terms of an A.P is 4n2 - n, find the 12th term ?

Asked by nisha_vini29 21st September 2015, 2:39 PM

Answered by Expert 21st September 2015, 6:44 PM

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## A cylinder of radius R is filled with water upto a height H , so that the thrust on the walls is equal to that on the bottom. The relation between H and R is ?

Asked by dipanshusingla029 24th March 2018, 1:21 PM

## A cube of edge length 'a' and density 'd' floats in a liquid of density 'D'. The maximum extra mass it can support without submerging is. ?

Asked by dipanshusingla029 24th March 2018, 1:19 PM

## From a point 36 m above the lake, the angle of elevation of a bird is observed to be 30 and the angle of depression of its image in water of the lake is observed to be 60. Find the actual height of the bird above the surface of the lake

Asked by Suneel 24th March 2018, 11:28 AM