Hight and distance

Find the equation of ellipse whose distance between foci is 8 units and distance between the directrices is 18 units.

You are standing at a distance 2 metre from a plane mirror. What is the distance between you and your image ?

Height & Distance

The focus of a parabolic mirror is at a distance of 6 cm from its vertex. If the mirror is 20 cm deep, find the distance LM.

Anupama takes 125 minutes in walking a distance of 100 metre. What distance would she cover in 315 minutes?

A mass M is lowered with the help of a string by a distance h at a distance acceleration g//2 . The work done by the string will be

4 charges are placed each at a distance .a. from origin. The distance .a. from origin. The dipole moment of configuration is :

In a spherical region the densiy varies inversely with the distance from ther centre Gravitational field at a distance r from the centre is .

Find the equation of an ellipse the distance between the foci is 8 units and the distance between the directrices is 18 units.

In an ellipse the distance between the foci is 8 and the distance between the directrices is 25, then the ratio of the length of major and minor axis is