" SI unit of power is "

What is the SI unit of power ?

S.I. unit of power.

What is S.I. unit of power of a lens?

What is the S.I. unit of power of a lens?

(a) Define power. Give the SI unit of power. A boy weighing 40 kg carries a box weighing 20 kg to the top of a building 15 m high in 25 seconds. Calculate the power. ( g = 10 m//s^(2) )