Question
Pipe P and Q can fill a tank in 20 minutes and 30
minutes individually. Another pipe R can empty the tank in 60 minutes. When all the three pipes are opened together then What will be the time taken by them to fill 75% of the capacity of the tank.Solution
ATQ, we can say that The capacity of the tank be = 60 units So, Part of the tank filled by P in 1 minute is = 3 units So, Part of the tank filled by Q in 1 minute = 2 units Therefore, Part of the tank emptied by R in 1 minute = 1 unit So, Part of the tank filled by P, Q and R in 1 minute = 4 units Hence, the Required time will be = [(¾) x 60 x (¼)] = 11.25 minutes
If ‘48b297a54’ is a nine digit number which is divisible by ‘11’, then find the smallest value of (a + b).
Which of the following numbers is divisible by 22?
Find the greatest number that will divide 49, 147 and 322 to leave the same remainder in each case.
What is the number of divisors of 480?
Find the smallest number that, when divided by 6, 8, and 12, leaves a remainder of 5 in each case.
A number n when divided by 6, leaves a remainder 3. What will be the remainder when (n2 + 5n + 8) is divided by 6?
The least perfect square number which is divisible by 9, 12, 15, 24:
Which of the following numbers is divisible by 11?
A number when divided by 45 leaves a remainder 21. What will be the remainder when the square of the same number is divided by 45?
On dividing a certain number by 304, we get 43 as the remainder. If the same number is divided by 16, what will be the remainder?
