If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
Practice Questions
1 question
Q1
If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
3 km/h
4 km/h
5 km/h
6 km/h
Speed downstream = Distance/Time = 60 km / 4 h = 15 km/h. Speed of current = Speed downstream - Speed of boat in still water = 15 km/h - 15 km/h = 0 km/h.
Questions & Step-by-step Solutions
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Q
Q: If a boat can travel 60 km downstream in 4 hours, what is the speed of the current if the speed of the boat in still water is 15 km/h?
Solution: Speed downstream = Distance/Time = 60 km / 4 h = 15 km/h. Speed of current = Speed downstream - Speed of boat in still water = 15 km/h - 15 km/h = 0 km/h.
Steps: 8
Step 1: Understand that the boat travels downstream, which means it is moving with the current.
Step 2: Calculate the speed of the boat downstream using the formula: Speed = Distance / Time.
Step 3: Plug in the values: Distance = 60 km and Time = 4 hours. So, Speed downstream = 60 km / 4 h.
Step 4: Calculate the speed downstream: 60 km / 4 h = 15 km/h.
Step 5: Know that the speed of the boat in still water is given as 15 km/h.
Step 6: To find the speed of the current, use the formula: Speed of current = Speed downstream - Speed of boat in still water.
Step 7: Plug in the values: Speed of current = 15 km/h - 15 km/h.
Step 8: Calculate the speed of the current: 15 km/h - 15 km/h = 0 km/h.
