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Question
A car started at a speed of 10 km/hr and increasing its speed by 5 km/hr for every 1 hour. If the car has travelled for 4 hours then find its average speed.
A car started at a speed of 10 km/hr and increasing its speed by 5 km/hr for every 1 hour. If the car has travelled for 4 hours then find its average speed.
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Solution
The correct option is B 17.5 km/hr
The speed of the car for respective hours is
10 km/hr for 0-1 hour
15 km/hr for 1-2 hour
20 km/hr for 2-3 hour
25 km/hr for 3-4 hour
Now, the average value of these speeds is 10+15+20+254
= 17.5 km/hr
17.5 km/hr
The speed of the car for respective hours is
10 km/hr for 0-1 hour
15 km/hr for 1-2 hour
20 km/hr for 2-3 hour
25 km/hr for 3-4 hour
Now, the average value of these speeds is 10+15+20+254
= 17.5 km/hr
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