1.

A, B and C go walking round a circle 2 km in circumference at the rates of 20 m/min, 40m/min and 50 m/min respectively. If they all start together and walk in the same direction, when will they be together at the same place ?

A. 110 min
B. 145 min
C. 170 min
D. 200 min
Answer» E.


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