man decided to cover a distance of 6km in 84 minutes . he decided to cover tow thirds of the distance at 4km / hr and the remaining at some different speed . find the speed after the two third distance has been covered
Answers
Time taken to cover a distance of 6 km = 84 minutes
Two thirds of the 6 km was covered at 4 km/hr
Formula used:
Time = Distance/Speed
Calculation:
Two thirds of 6 km = 6x(2/3) = 4 km
Speed for 4 km distance cover = 4 km/hr
So, Time = 4 km/4 km/hr = 1 hr = 60 minutes
⇒ Time left = 84 - 60 = 24 minutes = 24/60 = 0.4 hours
Remaining distance = 6 - 4 = 2 km
⇒ Speed required for remaining 2 km = D/T = 2 km/0.4 hr = 5 km/hr
∴ Speed after the two third distance has been covered is 5 km/hr
khatam! the end !
Given : Time taken to cover a distance of 6 km =
84 minutes
He covered Two third of the 6 km at 4
km/hr
Formula :
Time = Distance/Speed
Solution:
Two thirds of 6 km = 6x(2/3) = 4 km
Speed for 4 km distance cover = 4 km/hr
So, Time = 4 km/4 km/hr = 1 hr = 60 minutes
- → Time left = 84 - 60 = 24 minutes =
24/60 = 0.4 hours
Distance Left = 6 - 4 = 2 km
- → Speed required for left distance of 2 km = D/T = 2 km/0.4 hr = 5 km/hr
:: Speed after the two third distance has been covered is 5 km/hr