Train A travelling at 60 km/hr leaves Mumbai for Delhi at 6 pm. Train B travelling at 90 km/hr also leaves Mumbai for Delhi at 9 pm. Train C leaves Delhi for Mumbai at 9 pm. If all three trains meet at the same time between Mumbai and Delhi, what is the speed of train C if the distance between Delhi and Mumbai is 1260 km?
A. 60 kmph
B. 120 kmph.
C. 90 kmph
D. 135 kmph
Answers
Answered by
1
Step-by-step explanation:
Let the speed of train C be y km/hr
Distance travelled by train A in (x + 3) hrs = Distance travelled by train B in x hrs
⇒ 60 (x + 3) = 90x
⇒ 30x = 180
⇒ x = 6
⇒ Also, distance travelled by train B in x hrs + distance travelled by train C in x hrs = 1260 km
⇒ 90x + yx = 1260
⇒ 540 + 6y = 1260
⇒ 6y = 720
⇒ y = 120
Hence, speed of train C= 120 km/hr
Answered by
0
Answer:
Your answer is in the attachment
Attachments:
Similar questions