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bhavik bagiya

· started a discussion

· 1 Months ago

doubt (Question: 156625.0 )

y T1=T2?

Question:

Two trains start from P and Q respectively and travel towards each other at a speed of 50km/hr. and 40km/hr. respectively. By the time they met the first train had travelled 100km more than the second. Find the distance between P and Q?

Options:
A)

500 km

B)

630 km 

C)

660 km 

D)

 

900 km 

Solution:

Ans: (d)

D1 = S1T1

D2 = S2T2

S1T1 - S2 T2 = 100

T1 = T2

50 × T1 - 40T1 = 100

10T1 = 100

T1= 10 hrs. 

D1 = S1 T1 = 50 × 10

D1 = 500 kms. 

D2 = 400 kms.

Total distance = D1 + D2

= 900 kms.  

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