If a boat can go 25 km/h in still water and the current is 5 km/h, how long will
Practice Questions
Q1
If a boat can go 25 km/h in still water and the current is 5 km/h, how long will it take to travel 60 km downstream?
1.5 hours
2 hours
2.5 hours
3 hours
Questions & Step-by-Step Solutions
If a boat can go 25 km/h in still water and the current is 5 km/h, how long will it take to travel 60 km downstream?
Correct Answer: 2 hours
Step 1: Identify the speed of the boat in still water, which is 25 km/h.
Step 2: Identify the speed of the current, which is 5 km/h.
Step 3: Calculate the speed of the boat when going downstream by adding the speed of the boat and the speed of the current: 25 km/h + 5 km/h = 30 km/h.
Step 4: Identify the distance to be traveled downstream, which is 60 km.
Step 5: Use the formula for time, which is Time = Distance / Speed.
Step 6: Substitute the values into the formula: Time = 60 km / 30 km/h.
Step 7: Calculate the time: 60 divided by 30 equals 2 hours.
Relative Speed – Understanding how to calculate the effective speed of a boat when considering the influence of the current.
Time Calculation – Using the formula Time = Distance / Speed to find the duration of travel.
