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P, Q & R started travelling from the same point x in the same direction. P & Q started at 10:00 a.m. Then R started at 12 : 00 p.m. R overtook P at 2 : 00 p.m. and then doubled his speed. R overtook Q at 3:00 p.m. The ratio of speed of P & Q is

Option 1 -

5 : 7

Option 2 -

5 : 8

Option 3 -

5 : 13 

Option 4 -

8 : 13

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • P

    Answered by

    Payal Gupta | Contributor-Level 10

    a month ago
    Correct Option - 2


    Detailed Solution:

    Let speeds of P, Q & R be P, Q & R km/hr respectively.

    Thus 4P = 2R

    = PR  =  12 . (1)

    = 5Q = 4R = QR  =  45 . (2)

    From (1) & (2),

    = P/RQ/R  =  1/24/5

    = PQ  =  58

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