Let look at how to calculate average , distance and time taken, in a any movement carry out. This particular branch of mathematics always featured in common entrance examination,if you always get it hard in solving this, do not worry i'll show you the simplest method needed.
First to deal with this, you must be familiar with the three formula required, there are:
distance covered
(1)Finding the average speed: ------------------------
Time/hour taken
This means you divide the total distance by the given time taken.
(2) Finding the distance covered = Speed x time
This means you multiply the average by time taken
Distance
(3) Finding the time taken: -----------------------
Now let look at some examples, the formula above is the key to our success....
Exercises
Solution
Distance traveled = 250km
Average speed of the car = 50 Kmh
Distance
Time = --------------------------
A.speed
250
---------------- = 5h
50
So when ever you have this kind of question, do not worry, just divide the given distance by the average speed according to the formula.
A cyclist travels 48km at 16km⁻¹, Fine the time taken.
Solution
Distance traveled by motor cyclist = 48km
speed of the cyclist =16km⁻¹
Distance
Time taken = ---------------------
Speed
48km
-------------------- = 48
16kmh⁻¹
Time /hour = 3h
What is the distance covered by a car travelling at 65kmh⁻¹ for 7 hours
Solution
455km = 65 x 7
Distance raveled = 455km
Now can you see,i applied all the formula in each of the question
Exercises
Speed walking = 4km/h
Distance to cover up = 77km
77km
Time taken = ------------------ 19:25mins
4km/h
T.T = 19:25mins
It took the boy 19 hours 25 minutes to cover the distance of 77km...
1
2.If car is moving at an average speed of 50 km for a long time of 3 ------------ h, what distance will take the car to covered up.
2
Speed of the car = 50 km/h
Time taken = 3 x 2 + 1 = 7h
50 7
= ---------- x -----------
1 2
50 x 7
= ----------------------
2
350
= -------------- = 175km
2
Distance covered is 175km.
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