1.

1). 2.32 km2). 4.72 km3). 5.67 km4). 2.34 km

Answer»

DOWNSTREAM speed = 10 + 4 = 14 KM/hr

UPSTREAM Speed = 10 - 4 = 6 km/hr 

Distance travelled Upstream = Speed of upstream × time = 6 × 10/60 = 1 km

∴ Distance travelled Upstream is 1 km



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