come part of a journey of 555 km was completed by a car with speed of

1.	come part of a journey of 555 km was completed by a car with speed of 60 km/h thenthe speed is increased by 15 km/h and the journey is completed. If it takes 8 hours toreach. Find time taken and distance covered by 60km/h.father today the sum of their mar than lain
Answer» Total time taken = 8 hrTotal distance covered = 555 kmInitial speed of car = 60 km/hr Let time taken at speed 60 km/hr = tLet distance covered at speed 60 km/hr = d As per given conditiond/75 + (555 - d)/60 = 8(4d + 5(555-d))/300 = 84d + 2775 - 5d = 24005d - 4d = 2775 - 2400d = 375 km Now,60*t = 375t = 375/60 = 6.25 hrs Therefore,At speed 60 km/hr time taken = 6.25 hrsAt speed 60 km/hr distance covered = 375 km

come part of a journey of 555 km was completed by a car with speed of 60 km/h thenthe speed is increased by 15 km/h and the journey is completed. If it takes 8 hours toreach. Find time taken and distance covered by 60km/h.father today the sum of their mar than lain

Answer»

Total time taken = 8 hrTotal distance covered = 555 kmInitial speed of car = 60 km/hr

Let time taken at speed 60 km/hr = tLet distance covered at speed 60 km/hr = d

As per given conditiond/75 + (555 - d)/60 = 8(4d + 5(555-d))/300 = 84d + 2775 - 5d = 24005d - 4d = 2775 - 2400d = 375 km

Now,60*t = 375t = 375/60 = 6.25 hrs

Therefore,At speed 60 km/hr time taken = 6.25 hrsAt speed 60 km/hr distance covered = 375 km