Question

if the unit of length is doubled,unit of time is halved,and unit of force is quadrupled,the unit of power would change by the factor
1. 1/4
2.16
3. 1/16 
4. 8
which one will be correct option???pls solve it.....i want to see the whole process

Answer 1

Power = Work done / time
         = Force * Displacement / time
       REPLACING THESE QUANTITIES BY THE CHANGE IN VALUE
         = 4*2 /  (1/2)
         = 4*2*2=16
ANS. 2

Answer 2

Power= W/t
         =FS/t
Substituting them with numerals,
   P=4*2*2
     =16