Luigi estimates that he can travel at an average of 70km h^-1 between his house and the nearest town, 87 km away. On one journey it took 1 hr and 20 mins.

Calculate his average speed for this journey.

Question

Luigi estimates that he can travel at an average of 70km h^-1  between his house and the nearest town, 87 km away. On one journey it took 1 hr and 20 mins.

Calculate his average speed for this journey.

anonymous · Answer

average speed = distance / time
                        = 87 / 4/3 = 65 1/4 km h^-1

anonymous · Answer

OMG ! thank you, wait okay, so how would I calculate the error in his estimate? I know that to calculate error its VA-VE/VE but uh what #'s do I use ?