# The motor ship went on the lake of 3 h with a speed of 27 km/h, and then 4 h down the river, flowing into this lake. Find all way which passed the motor ship for these 7 h if the speed of a watercourse of 3 km/h. Both decision, and short record!

Aetiy

125

On the lake of 3 h the speed is 27 km/h down the river of 4 h the speed of a current there are 3 km/h. The way - 1) 27*3 = passed 81 km across the lake As the river flows into lakes, 2 down the river went) 27-3 = 24 km/h against the stream - speed against the current. 3) 24*4 = Passed 96 km down the river. 4) 81+96 = Passed 177 km all.

190

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