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Pawan Kumar

· started a discussion

· 1 Months ago

Doubt/Error (Question: 394566.0 )

Let speed of Express= x kmph
A.T.Q
(612/x) - (612/2x) = 6 hours
=> x= 51 kmph

Now how can the speed of Rajdhani be less than Express in this question.( i.e, 40.8 kmph)

Question:

To travel 612 km, an express train takes 9 hours more than Rajdhani. If the speed of the express train is doubled, it takes 3 hours less than Rajdhani. The speed (in km/hr.) of Rajdhani is –

Options:
A)

40.8

B)

51

C)

30.6

D)

61.2

Solution:

Ans: (a)


Pawan Kumar

· commented

· 1 Months ago

My apologies! I have got my mistake. Your solution is correct.
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