exam
Maths Puzzle
Numerical Ability
An airplane took 2 hours to fly 600km against a head wind. The return trip with the wind took 1 2/3 hours. Find the speed of the plane in still air.
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exam Other Question
Candy and Tim share a paper route. It takes Candy 30 min to deliver all the papers, and it takes Tim 90 min. How long does it take the two when they work together?
Write the standard from of the equation and the general form of the equation of each circle of radius r and center (h,k);graph each circle.
The problem says: r=4; (h,k)=(2,-3)