One unit of power of a motor is `150` W at is in some system of unit. If the unit of force is doubled and unit of velocity trpled, then one new unit of power of motor is

Options

A. `25 W`
B. `150 W`
C. `225 W`
D. `900 W`

Answer

A

Explanation

`P = fv`
`n u =` constant
`n =` no. attached, `u =` size of unit
`P' = (F)/(2) (V)/(3) = (P)/(6)`
so, size of power will becomes 6 times