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The time taken by a boat to go a certain distance upstream is twice the time taken by it to go the same distance downstream. If the speed of the stream is 3 km/h, then how much time (in hours) will the boat take to go 52 km upstream?
If \(tan\space \theta-cot\space \theta = cosec\space \theta\), \(0^0<\theta<90^0\), then what is the value of \({2tan\space \theta-cos\space \theta\over \sqrt3cot\space \theta+sec\space \theta}\) ?
An article is sold at a certain price. If it is sold at \(33\frac{1}{3}\%\) of this price, there is a loss of \(33{1\over3}\%\). What is the percentage profit or percentage loss when it is sold at 40% of the original selling price?