exam Maths Puzzle Numerical Ability

A boat cruises 36 miles against a 3 mph current and 36 miles back with the same current. The round trip takes 5 hours.What is the speed of the boat in still water?

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exam Other Question
Tax is 8% on gizmos. You paid $52.38. What was the pre-tax price?

52.38*.08=4.19 pretax

52.38-4.19= 48.19 is that correct? solve and graph on a number line 4-3(x+2)<2(2x+3)-1