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Ruchir walks at 20 km./hr. and Rukma cycles at 25 km./hr. towards each other. What was the distance between them when they started if they meet after 48 minutes?

a

45 km

b

54 km.

c

27 km

d

36 km

Answer : Option D

Explanation :

Required distance

$=(20+25) imes frac{48}{60} mathrm{~km}$

Required distance $=45 imes frac{4}{5}$ $=36 mathrm{~km}$ .