Answer:
18 km / hr.
Is Right answer
Let the distance two-port be x km.
Let the speed of the boat in still water be S km/hr.
According to the question,
In downstream,
X = (s+2) × 4 ------- (1) As, (Distance = Speed × Time)
Similarly,
In Upstream,
X = (s-2) × 5 ---------(2)
From (1) & (2)
(s+2) 4 = (s-2) 5
4s + 8 = 5s - 10
8 + 10 = 5s - 4s
18 = s
So, Speed of the Boat is 18km/hr.
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Answers & Comments
Answer:
18 km / hr.
Is Right answer
Verified answer
Let the distance two-port be x km.
Let the speed of the boat in still water be S km/hr.
According to the question,
In downstream,
X = (s+2) × 4 ------- (1) As, (Distance = Speed × Time)
Similarly,
In Upstream,
X = (s-2) × 5 ---------(2)
From (1) & (2)
(s+2) 4 = (s-2) 5
4s + 8 = 5s - 10
8 + 10 = 5s - 4s
18 = s
So, Speed of the Boat is 18km/hr.