A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the ...

A man swims downstream 30 km and upstream 18 km taking 3 hours each time, what is the speed of the man in still water?

Answer/Solution

8

Steps/Work

30 --- 3 DS = 10
? ---- 1
18 ---- 3 US = 6
? ---- 1 M = ?
M = (10 + 6)/2 = 8
Answer: B

Physics Calculator / Auto Solver

A man swims downstream km and upstream km taking hours each time, what is the speed of the man in still water?

Calculated Answer

8

Step by Step Solution

In order to solve problem, you must evaluate (n₁ / n₂ + n₀ / n₂) / 2.

n₀ =	30
n₁ =	18
n₂ =	3

(n₁ / n₂ + n₀ / n₂) / 2
Evaluate n₁ / n₂ = 6
(6 + n₀ / n₂) / 2
Evaluate n₀ / n₂ = 10
(6 + 10) / 2
Evaluate 6 + 10 = 16
16 / 2
Evaluate 16 / 2 = 8
8
The answer to the problem and the result of (n₁ / n₂ + n₀ / n₂) / 2 is 8