Question
A boat running upstream takes 8 hours 48 min to cover a certain distance while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of water current respectively?
Answer: Option C
LET THE SPEED OF BOAT BE X KM/HR AND SPEED OF STREAM BE YKM/HR.
44/5 × (X -Y) = 4X (X +Y)
=> 44(X-Y) = 20 (X+Y)
=>11 (X-Y) = 5 (X +Y)
=> 6X =16 Y
=> X/Y = 16/6 = 8/3
=> X : Y = 8 : 3
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LET THE SPEED OF BOAT BE X KM/HR AND SPEED OF STREAM BE YKM/HR.
44/5 × (X -Y) = 4X (X +Y)
=> 44(X-Y) = 20 (X+Y)
=>11 (X-Y) = 5 (X +Y)
=> 6X =16 Y
=> X/Y = 16/6 = 8/3
=> X : Y = 8 : 3
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