Question
Pipes P and Q can fill a tank in 90 minutes and 60
minutes respectively. Another pipe R can drain the tank in 2 hours 30 minutes. Q and R are opened together. After 40 minutes, Q is turned off and P is opened. How much total time will it take to fill the tank?Solution
ATQ,
Let the capacity of tank be 180 litres (LCM of 90, 60 and 150) Efficiency of 'P' = 180 ÷ 90 = 2 litres/minute Efficiency of 'Q' = 180 ÷ 60 = 3 litres/minute Efficiency of 'R' (outlet pipe) = 180 ÷ 150 = -1.2 litres/minute Tank filled in 40 minutes = (3 - 1.2) × 40 = 72 litres Remaining tank = 180 - 72 = 108 litres Time taken to fill remaining = 108 ÷ (2 - 1.2) = 135 minutes Required total time = 40 + 135 = 175 minutes
Which of the following statements is/are correct about The Pradhan Mantri Schools for Rising India (PM-SHRI) Yojana?
       I.     �...
Which of the following statements is/are correct in regards to the Particularly Vulnerable Tribal Groups (PVTGs)?
1.In 1973, the Dhebar Commissio...
Pollutants responsible for acid rains are:
In what ratio coffee at 305 Rs/kg should be mixed with the coffee at 355 Rs/kg so that after mixture its rate become 320 Rs/kg if the quantity of 1st ty...
A number is decreased by 5% and then increased by 10%. What is the percent increase or decrease of the number thus obtained from the original number ?
If day before yesterday it was Monday, then which will be the day on day after tomorrow ?
On the recommendation of which Commission, The payment of wages act 1936 Drafted?
What was the main objective of the Industrial (Development and Regulation) Act, 1951 in India?
Dhanvantari was
In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. Which numbers should repla...
Relevant for Exams:
