Every morning, Jim goes for a morning walk. His normal walking speed is 4 6/8 km per hour, and he walks a total distance of 10 km every day. How much time does he take to cover one km?
Answers
Given data : Every morning, Jim goes for a morning walk. His normal walking speed is 4 6/8 km per hour, and he walks a total distance of 10 km every day.
To find : How much time does he take to cover one km ?
Solution : according to given,
⟹ Walking speed of Jim = 4 6/8 km/hr i.e.
⟹ Walking speed of Jim = 19/4 km/hr i.e.
⟹ Walking speed of Jim = 4.75 km/hr
Now,
⟹ Walking speed of Jim = 4.75 km/hr
⟹ Walking speed of Jim = (4.75 * 1000)/(3600) m/s
⟹ Walking speed of Jim = 4750/3600 m/s
⟹ Walking speed of Jim = 95/72 m/s
We know, 1 km = 1000 m
Now, we use formula of speed to find time taken by Jim to cover distance 1 km.
⟹ speed of Jim = distance/time
⟹ 95/72 = 1000/time
⟹ 95 * time = 1000 * 72
⟹ 95 * time = 72000
⟹ time = 72000/95
⟹ time = 757.8947 sec. (approx)
Now, we convert this 757.8947 sec into hour. { here we know 1 hour = 3600 sec }
- 757.8947 sec = 757.8947/3600 hour
- 757.8947 sec = 0.2105 hour (approx)
Now, converting 0.2105 hour into minutes.
- 0.2105 hour = 0.2105 * 60 minutes
- 0.2105 hour = 12.63 minutes
Answer : Therefore time taken by Jim to cover 1 km is 0.2105 hour or 12.63 minutes.
Second Method :
Solution :
⟹ Walking speed of Jim = 4 6/8 km/hr = 19/4 km/hr
To find, time taken by Jim to cover distance 1 km.
By formula of speed,
⟹ speed of Jim = distance/time
⟹ 19/4 = 1/time
⟹ time = 4/19
⟹ time = 0.2105 hour (approx) or 12.63 minutes (approx)
Answer : Therefore time taken by Jim to cover 1 km is 0.2105 hour or 12.63 minutes.
More info : Here we know Jim a total distance of 10 km every day.
Now, to find time taken by Jim to cover 10 km.
⟹ speed of Jim = distance/time
⟹ 19/4 = 10/time
⟹ time = 40/19
⟹ time = 2.105 hour (approx) or 126.3 minutes (approx)
Answer:
hope it helps you dear brainliest
