Given that the speed, V of a car is inversely proportional to the time, t, then the equation relating V to t, where k is a constant is:
v = kt.
Vk = t.
Vk = 1/t.
V = k/t.
Given that V = πr²l, expressing r in terms of V, π and l gives:
(√V) / πl.
(V / πl)².
V / 2πl.
√(v / πl)
Given that P = E / WL, an expression for W in terms of P, E and L is:
PE / L.
E / PL.
PL / E.
PLE.
