Monday, July 4, 2011

(Viva Voce) Chap 9 Exercise 9 Question {2}

Question 2:
Car X travels 60 km in 45 minutes. Car Y travels 72 km in 1 h 20 min. Find
(a) The average speed of car X
(b) The average speed of car Y
The ratio of average speeds of cars X and Y

To find the average speed , we need to divide the the distance by time .

(a)Distance of car x:60 km
Time: 45 min
60km/45min ≈ 1.33km/min
(b)Distance:72 km
Time: 1h20min=80 mins
72km/80mins=0.9 km/min

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