there is a waste paper basket of diameter D and height 2D. u throw a burning match from the same level as the bottom of the basket ,the horizontal distance between the near side of basket and the point from which u throw the match. u launch the match at 45 degrees with the horizontal. find the...
A swimmer crosses a flowing river of width d to and fro in time t1. The time taken to cover the same distance up and down the stream is t2. If t3 is the time the swimmer would take to swim a distance 2d in still water, then prove that t1 square = t2t3.
:cry: I can't solve it, please helpppp!
problem :- there are 8 points in a plane (non collinear) find the maximum number of triangles formed out of these points such that no 2 triangles have more than one common vertex.
problem on beats , pleaseeee helppppp!
I am puzzled!
problem----- A man standing in front of a mountain beats a drum at regular intervals. The drumming rate is gradually increased and he finds that the echo is not heard distinctly when the rate becomes 40 per minute. He moves nearer to the...