Find the total time taken by boat to travel upstream and downstream, if the distance
travel in each direction (upstream and downstream) is 270km. If speed of boat is 24
km/h and speed of current is 21 km/h.
-
A.
104 hours
-
B.
87 hours
-
C.
96 hours
-
D.
106 hours
Correct Answer:
C. 96 hours
Explanation:
The correct answer is Option C: 96 hours.
To find the total time, calculate the time taken for both the upstream and downstream journeys. The speed of the boat downstream is the sum of the boat's speed and the current's speed (24 + 21 = 45 km/h), while the upstream speed is the difference (24 - 21 = 3 km/h). The time taken downstream is 270 km / 45 km/h, which equals 6 hours. The time taken upstream is 270 km / 3 km/h, which equals 90 hours. Adding these together, the total time for the entire trip is 6 + 90 = 96 hours.
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