729ml of a mixture contains milk and water in the ratio 7:2. How much of the water is to be added to get a new mixture containing half milk and half water?
A tap can fill a tank in 15minutes and another tap attached to the same tank when opened can empty it in 8minutes. If both taps are opened at the same time, the tank will be empty in WHAT minutes? or filled in WHAT minutes?
The Royal Fruit Company produces two types of fruit drinks. The first type is pure fruit juice, and the second type is pure fruit juice. The company is attempting to produce a fruit drink that contains pure fruit juice. How many pints of each of the two existing types of drink must be used to make pints of a mixture that is pure fruit juice?
Gold is 19 times as heavy as water, copper is 9 times as heavy as water. in what ratio should these be mixed to get an alloy 15 times as heavy as water?