Question

can a body have constant speed but variable velocity?

Answer 1

A body can have a constant speed but a changing velocity because the direction can change while the speed is constant. (A car goes 50 mph around a roundabout). 
However, a body can not have a constant velocity with a changing speed. 
A car can not be slowing down yet still be going the same speed and direction......
hope it helps u .....:::)))))

Answer 2

yes,, it is posible in uniform circular motion where speed is constant and velocity is changing because of direction