Related Questions

An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank?
A 33.5%
B 37.5%
C 40%
D 50%
An empty fuel tank of a car was filled with A type petrol. When the tank was half-empty, it was filled with B type petrol. Again when the tank was half-empty, it was filled with A type petrol. When the tank was half-empty again, it was filled with B type petrol. What is the percentage of A type petrol at present in the tank ?
A 33.5%
B 37.5%
C 40%
D 50%
A tank has two leakages. The first leakage alone can empty the tank in 9 minutes and the second alone would have done it in 6 minutes. If water leaks out at a constant rate. how long does it take both the leakage together to empty the tank ?
A 3.6 min
B 3.1 min
C 3.5 min
D 4.0 min
Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank ?
A 4.5 hrs
B 7 hrs
C 18 hrs
D 36 hrs
A tank has two leakages. The first leakage alone can empty the tank in 9 min and the second alone would have done it in 6 min. If water leaks out at a constant rate , how long does it take both the leakage together to empty the tank?
A 3 min
B 3.5 min
C 4 min
D 3.6 min
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
A $$\frac{5}{{11}}$$
B $$\frac{6}{{11}}$$
C $$\frac{7}{{11}}$$
D $$\frac{8}{{11}}$$
A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
B 4
C 6
D 5
A water tank is two-fifth full. Pipe A can fill a tank on 10 minutes and pipe B can empty it in 6 minutes. If both the pipes are open, how long will it take to empty or fill the tank completely ?
A 6 min to empty
B 6 min to fill
C 9 min to empty
D 9 min to fill
A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?
A p+q-qpqr
B pq+pr-pqpqr
C pq+qr-prpqr
D pqrqr+pr-pq
A tap can fill the tank in 15 minutes and another can empty it in 5 minutes. If the tank is already half -full and both the taps are opened together , how many minutes will the tank take to be emptied?
A 8
B 12
C 16
D None of these

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