I'm trying to answer a question in minutes but I just can't seem to be able to eliminate all the other units.
((B×D)/(M×PWR))×60
B = 500Wh, D = 80% of B, M = 12.505kg, PWR = 55W/kg
I should be able to cancel out Watts as one is a numerator and the other a denominator. D is unitless? which leaves me with lets say
(400h/12.505kgx55kg)x60
I can't just cancel out kg as they are both denominators... right? so that's where I'm stuck. if I can't cancel kg and just leave me with **hx60 and end up with an answer I can put into minutes.
Any help is appreciated!
Your original equation is: $$\displaystyle \frac{Wh}{kg \times\frac{W}{kg}}$$
Cancelling W gives: $$\displaystyle \frac{h}{kg \times\frac{1}{kg}}$$
$$\boxed{\text{Remember that cancelling W from the denominator leaves} \frac{1}{kg} \text{and not kg}}$$
Simplifying the denominator: $$\displaystyle \frac{h}{{kg} \times\frac{1}{kg}} \rightarrow \frac{h}{1} $$
$$\therefore h$$