how many hours would it take for a biker to travel 54km if the first hour he travelled 15km and each subsequent hour he travelled 1km less than the hour before ?
Answers
Answered by
33
Given Total Distance=54Km
Distance Travelled in:
1hour=15
2hour=15+14=29
3hour=29+13=42
4hour=42+12=54
So Total Time taken =4hour.
You could also Do it with the AP. and Quadratic Formula Methods. But that Might take too Long. and Theres more possibility to go Wrong.
Distance Travelled in:
1hour=15
2hour=15+14=29
3hour=29+13=42
4hour=42+12=54
So Total Time taken =4hour.
You could also Do it with the AP. and Quadratic Formula Methods. But that Might take too Long. and Theres more possibility to go Wrong.
Answered by
12
It is given that the biker travels at the the speed of 15 km during the first hour and travels 1km less than the hour before for the subsequent hours. Therefore,
54-15=39 (1st hour)
39-14=25 (2nd hour)
25-13=12 (3rd hour)
12-12=0 (4th hour)
Hence, it takes 4 HOURS for the biker to cover a distance of 54km
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