assume that the distance between Delhi and Agra is 200km. it took a train 2 hours and 15 minutes to cover this distance. if the railways decide to cover this distance within 15 minutes less time, how much change in speed is required?
Answers
Answered by
0
........................................
Answered by
2
Distance ,s= 200km
Intial time,t = 2hr 15 min
= 2 (15/60) = 9/4 hr
>>
Initial speed,u = s/t = 200*4/9 = 800/9 km/hr
New time, t2 = 2hr
New speed,v = s/t2 = 200/2 = 100km/hr
Difference of speed = v - u
= 100 - 800/9 = (900-800)/9 = 100/9 km/hr = 11.11 km/hr ans
Intial time,t = 2hr 15 min
= 2 (15/60) = 9/4 hr
>>
Initial speed,u = s/t = 200*4/9 = 800/9 km/hr
New time, t2 = 2hr
New speed,v = s/t2 = 200/2 = 100km/hr
Difference of speed = v - u
= 100 - 800/9 = (900-800)/9 = 100/9 km/hr = 11.11 km/hr ans
Himy3598:
2(15/60)=9/4 hour kaise
2hr 15min= 2(15/60) = 2 + 15/60 = 2 + 1/4 = (8+1)/4 = 9/4hr
Similar questions