how many hours would it take for a biker to travel 54 km if the first are you travelled 15 km and each subsequent hour he travelled 1 km less than the hour before
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Where's the problem bro, you have already got the correct answer
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viratkohli69:
i had a doubt
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Answer:
It will take 4 hours for a biker to travel 54 km
Step-by-step explanation:
The first hour you traveled 15 km and each subsequent hour he traveled 1 km less than the hour before
So, AP : 15,14,13,......
first term = a = 15
d = common difference = -1 km
n = no. of hours
Now we are supposed to find how many hours would it take for a biker to travel 54 km
Formula of sum of first n terms =
At n = 4
So, it will take 4 hours for a biker to travel 54 km
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