A boat can go 15 km upstream in 3 hours. What is the speed of the boat in still water if the speed of the current is 3 km/h?
Practice Questions
1 question
Q1
A boat can go 15 km upstream in 3 hours. What is the speed of the boat in still water if the speed of the current is 3 km/h?
4 km/h
5 km/h
6 km/h
7 km/h
Speed upstream = Distance/Time = 15 km / 3 h = 5 km/h. Speed of boat in still water = Speed upstream + Speed of current = 5 km/h + 3 km/h = 8 km/h.
Questions & Step-by-step Solutions
1 item
Q
Q: A boat can go 15 km upstream in 3 hours. What is the speed of the boat in still water if the speed of the current is 3 km/h?
Solution: Speed upstream = Distance/Time = 15 km / 3 h = 5 km/h. Speed of boat in still water = Speed upstream + Speed of current = 5 km/h + 3 km/h = 8 km/h.
Steps: 9
Step 1: Identify the distance traveled upstream, which is 15 km.
Step 2: Identify the time taken to travel upstream, which is 3 hours.
Step 3: Calculate the speed upstream using the formula: Speed = Distance / Time.
Step 4: Substitute the values: Speed upstream = 15 km / 3 h.
Step 5: Perform the calculation: 15 km / 3 h = 5 km/h.
Step 6: Identify the speed of the current, which is 3 km/h.
Step 7: Calculate the speed of the boat in still water using the formula: Speed of boat in still water = Speed upstream + Speed of current.
Step 8: Substitute the values: Speed of boat in still water = 5 km/h + 3 km/h.
Step 9: Perform the calculation: 5 km/h + 3 km/h = 8 km/h.
