Q 1474612556.     `P` and `Q` are `27` km away. Two trains will having speeds of `24` km/h and `18` km/h respectively start simultaneously from `P` and `Q` and travel in the same direction. They meet at a point `R` beyond `Q`. Distance `QR` is

A

`126` km

B

`81` km

C

`48` km

D

`36` km

HINT

If the trains meet after t h. Relative speed of train = (24 -18) = 6 km/h ⇒ Distance = 27 ∴ t = 27/6 = 9/2 h

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