book Maths Puzzle Numerical Ability

In his outboard, Kirk can travel 13.5 miles against the river current in 3 hours. In the same time, he can travel 22.5 miles with the current. What is the speed of the boat in stil

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Find the sum,diferrence,product,and quotientof the monomials 24z and 6z At 10am a car leaves a house at a rate of 60 mph. At the same time another car leaves the same house at a rate of 50mph in the opposite direction. At what time will the cars be 3