Question

A girl does 1500 Joule of work in 3 hours .find her power

Answer 1

Answer:

                50watt

solution:

           p=w/t

          p=joule/hour

          p=150/3

          p=50

           

Answer 2

$\large\underline{\bigstar \: \: {\rm Given-}}$

• A girl does work (W) = 1500 J
• In Time (t) = 3 hours

$\large\underline{\bigstar \: \: {\rm To \; Find -}}$

• Power (P)

$\large\underline{\bigstar \: \: {\rm Formula \: Used -}}$

$\implies\underline{\boxed{\rm Power (P)=\dfrac{Work \: Done}{Time}}}$

$\large\underline{\bigstar \: \: {\rm Solution-}}$

✪ Convert hours into second :

$\implies{\rm t = 3 \: h }$

$\implies{\rm t = 3 \times 60 \times 60 }$

$\implies{\bf t = 10800 \: s}$

$\implies{\rm P = \dfrac{1500}{10800}}$

$\implies{\bf P = 0.13 \: Watt}$

$\large\underline{\bigstar \: \: {\sf Answer-}}$

Power of girl is ${\bf 0.13\: Watt}$