A boat moves downstream at the rate of 8 km per hour and upstream at 4 km per hour. The speed of the boat in still waters is:
Question
A boat moves downstream at the rate of 8 km per hour and upstream at 4 km per hour. The speed of the boat in still waters is:
Solution
The speed of a boat in still water is calculated by taking the average of its downstream and upstream speeds.
Here's how you can calculate it:
-
First, add the downstream speed and the upstream speed. In this case, 8 km/h (downstream speed) + 4 km/h (upstream speed) = 12 km/h.
-
Then, divide the result by 2 (because we are finding the average). So, 12 km/h ÷ 2 = 6 km/h.
Therefore, the speed of the boat in still waters is 6 km/h.
Similar Questions
A boat goes 12 km upstream and 40 km downstream in 8 hours. It can go 16 km upstream and 32 km downstream in 8 hours. Find the speed of the boat in still water and the speed of the stream respectively.
The speed of a boat in still water and the speed of the current is in a ratio of 4 : 3. If the difference between the distance covered by the boat in 3 hours upstream and in 3 hours downstream is 54 km. The speed of a boat in still water is
A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
A man rows a boat 18 kilometres in 4 hours downstream and returns upstream in 12 hours. The speed of the stream (in km per hour) isa.1.75b.1c.2d.1.5
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.