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speed of boat in still water = x
speed of the flow of water =y
speed of boat moving downstream
= x + y = 48---------1⃣
speed of boat moving upstream
= x - y = 24----------2⃣
solving for X and Y
x + y = 48 ➕
x - y = 24
---------------
2x = 72
x = 72/2 = 36
speed of boat in still water = 36
speed of the flow of water =y
speed of boat moving downstream
= x + y = 48---------1⃣
speed of boat moving upstream
= x - y = 24----------2⃣
solving for X and Y
x + y = 48 ➕
x - y = 24
---------------
2x = 72
x = 72/2 = 36
speed of boat in still water = 36
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