Question

What do you mean by physical quantities 

Answer 1

IT IS THE PHYSICAL PROPERTY OF THE PHENOMENON,BODY OR SUBSTANCE THAT CAN BE QUANTIFIED BY MEASUREMENT

Answer 2

Physical quantities are the quantities that can be measured. 
eg:- distance, speed, time, acceleration. mass, force
there are mainly two types of physical quantities
- fundamental quantities
- derived quantities

fundamental quantities or base quantities are those  quantities which cannot be expressed in terms of simpler quantities
eg :- mass, length, time

derived quantities are those quantities which can be expressed in terms of simpler quantities.
eg:- area, volume, speed, velocity, acceleration, force....