harder math question
John was rowing down a river when his hat was blown off by a sudden gust of wind. After 10 minutes, he found out, turned the boat around and rowed back upstream to find his hat. Then after 2 minutes, he reached the hat. If the current is constant and John rows at a constant rate, what is the rate of the current?
i am also middle school and i am in a international school too. It is already summer vacation but my tutor give me a this kind of question and i do not know how to write it can you just tell me the solution and answer. please! thankyou.
sorry grammar wrong "a kind"
- Paul大先生Lv 59 年前最佳解答
also assume that the hat stay at where it was blown off,
c = rate of the current
r = rate of John rows
the distant John's boat float = 10c = the distance John row back = 2(r-c)
use minus sign since c and r in opposite direction
10c = 2(r-c) = 2r - 2c
12c = 2r
c = r/6
answer: "rate of the current" = one sixth of "rate of John rows" (in opposite direction)
2011-06-23 15:23:33 補充：
well, 國中, 讀外僑 - I hope you can solve similar questions by yourself now
2011-06-24 12:51:56 補充：
I gave you step by step solution and completed with the answer already. Which part don't you understand??
Was it English or math?
Uncle Paul參考資料： self, uncle Paul