The diagram shows a segment of a circle such that CDCD is perpendicular bisector of the chord AB.AB. Given that AB=28AB=28 and CD=7,CD=7, find the diameter of the circle.
Nicole is participating in a cycling event. Following chart shows the distance traveled by her in ten hours. Find the total number of hours of rest when she did not ride.
Cost of a packet of coffee powder and a litre of milk are €28 and €20 respectively. 14 cups of coffee is made with one packet of coffee powder and for each cup 200ml of milk is used. If coffee is sold at 30% profit, then what is the selling price of each cup of coffee?