For the following questions answer them individually
Tank 'A' is two-fifths full. Pipe P can fill it in 10 minutes while pipe Q can empty it in 6 minutes. In what time will the tank get empty, if both P and Q are opened?
A boat whose speed in still water is 15 km/h goes 30 km downstream and comes back upstream in 4.5 hours. What is the speed of water current?
The difference between the Simple Interest on some principal at 8% for 8 months and 6% for 14 months is Rs.200. What is the principal?
The length of the direct common tangent to two circles of radii $$r_1$$ and $$r_2$$ and is the distance between their centres is:
In a certain code, 26 stands for 'A', 25 stands for 'B'. Which of the following stands for the name of a country?
How many litres of water must be added to 16 litres milk containing 10% water to dilute it with 20% water?
