Height and Distance: JEE Main 2014 Mathematics question

JEE Main 2014 · Session, Shift 1 · Q3903

JEE Main 2014Session, Shift 1MathematicsMediumHeight and Distance38× since 2004

A bird is sitting on the top of a vertical pole

20

m high and its elevation from a point

O

on the ground is

{45^ \circ }

. It files off horizontally straight away from the point

O

. After one second, the elevation of the bird from

O

is reduced to

{30^ \circ }

. Then the speed (in m/s) of the bird is :

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JEE Main 2014 Height and Distance Question with Solution (Session Shift 1, Q3903) | JEE Arc