Who invented the rabies vaccine?

From the top of a lamp post of height x metres, two objects on the ground on the same side of it (and in line with the foot of the lamp post) are observed at angles of depression of 30° and 60°, respectively. The distance between the object is $$ {32{\sqrt{3}{\ meter}}}$$. The value of  x is:

_____ mirror is used by dentist to see the minute details of the tooth in a magnified form.

Recently which state has started 'Dial 112' ERSS and State Emergency Response Center?

Who among the following is the first female cricket commentator of India?

A man can row 52 km upstream and 42 km downstream in 10 hours. It is also known that he can row 66 km downstream and 60 km upstream in 13 hours. Find the speed of the man in still water.

If the sales tax be reduced from $$ 3{1\over2}$$ % to $$ 3{1\over3}$$%, what difference does it make to person who purchases an article whose marked price is Rs.8400? 

Indian Space Research Organisation has received a patent for its method of manufacturing highland lunar soil simulant or moon soil. This soil is made from anorthosite rocks of which state?