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1. A man can row upstream at 8 kmph and downstream at 13 kmph. The speed of the stream is
None of these
2- If the sum of the interior angles of a regular polygon measures upto 1440 degrees, how many sides does the polygon have?
3. Number of solutions of the equation tan x + sec x = 2 cos x, lying in the interval [0, 2p] is
4. A alone can do a piece of work in 6 days and B alone 8 days. A and B undertook to do it for Rs.3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?
5. A train travels at an average of 50 miles per hour for 2x1/2 hours and then travels at a speed of 70 miles per hour for 1x1/2 hours. How far the train did travels in the entire 4 hours?