Re: Two methods to calculate total average speed

Can you explain how this works? 2D/(D/S1+D/S2) = 2S1*S2/(S1+S2) To simplify the fractions in the formula, you need to multiply the numerator and denominator by the same value (remember that multiplying by X/X = 1 retains the value of the expression). In the case of the formula above, we need to mul...