A car with speed 60 km/he takes 8 hrs to travel some distance. What should be the increase in the speed if the same distance is to be covered in 7 integer 1/2
Answers
Answered by
2
Question:
- A car with speed 60 km/hr takes 8 hrs to travel some distance. What should be the increase in the speed if the same distance is to be covered in hours.
Answer:
Step-by-step explanation:
Let the distance to be covered be ‘x’ Km
- Speed, v = 60 Km/hr
- Time taken, t = 8 hr
We know that,
Therefore,
We get,
Therefore,
Distance = 480 Km
Now,
Let the speed be ‘s’ km/hr
Also,
- Distance = 480 km
- Time taken = hr
Therefore,
Hence,
He should increase his speed by 4 km/hr
Answered by
40
Given :----
- initial speed = 60km/h
- initial time = 8 hours .
To Find :----
- Speed of car increased if new time is 7(1/2) hours ?
Formula used :----
- Distance = Speed × Time
- Speed = Distance / Time
Solution :-----
car takes 8 hours at the rate of 60km/h to cover a distance ,
so, Total distance = S×T = 60×8 = 480km
Now, it has been said this same distance would be covered in 7(1/2) or 15/2 hours .
so,
Speed of car will be = D/T = 480 ÷ 15/2 = 480×2/15 = 64km/h .
inital speed = 60km/h .
so, increased in speed = 64 - 60 = 4km/h
Hence , speed of car will be 4km/h more to cover same distance in 7(1/2) hours .
(Hope it Helps you)
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