The speed of current is 5km/hr. a motorboat goes 10 km upstream and back again to the starting point in 50min
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let the distance = x
T1= x/5
T2= x/15
a/q
x/5+x/15=5/6
4x/15=5/6
24x=75
x= 75/24
=3.125 km
T1= x/5
T2= x/15
a/q
x/5+x/15=5/6
4x/15=5/6
24x=75
x= 75/24
=3.125 km
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