1.

A Boat Covers A Distance Of 30 Km In 2 ½ Hours Running Downstream While Returning It Covers The Same Distance In 3 ¾ Hours. What Is The Speed Of The Boat In Still Water?

Answer»

SPEED downstream = (30 x 2/5)km/hr = 12km/hr

Speed upstream = (30 x 4/15) km/hr = 8 km/hr 

Speed of BOAT in STILL water = ½ (12 + 8)km/hr = 10 km/hr.

Speed downstream = (30 x 2/5)km/hr = 12km/hr

Speed upstream = (30 x 4/15) km/hr = 8 km/hr 

Speed of boat in still water = ½ (12 + 8)km/hr = 10 km/hr.



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