exam Maths Puzzle Numerical Ability

time it takes to travel 180 miles upstream. the speed oof the current in the stream is 5.5 milies per hour. find the speed of the boat in still water.

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exam Other Question

If the perimeter of a rectangular swimming pool is 118 feet, find the length and width when the length is 1/3 of the width plus 7. (Use P=2L+2W) I can not seem to figure out the correct equation. Help me solve this equation: 0.31x+0.49(x+315)=215.15