Question
Pipe ‘A’ and pipe ‘B’, together can fill 20% of
a tank in 5 hours while pipe ‘C’ takes 30 hours to empty it. Pipe ‘A’ and pipe ‘B’ were opened together. After 24 hours, pipe ‘C’ is also opened. Find the total time taken to fill the empty tank this way.Solution
Time taken by pipe ‘A’ and pipe ‘B’, together to fill the tank = 5/0.2 = 25 hours Let the total capacity of tank = 150 units Efficiency of pipe (A + B) = 150/25 = 6 units/hour Efficiency of pipe ‘C’ = 150/30 = 5 units/hour Tank filled by pipe (A + B) in 24 hours = 24 × 6 = 144 units Time taken by all three pipes to fill the remaining tank = (150 – 144)/(6 – 5) = 6 hours Total time taken = 24 + 6 = 30 hours
How many such pair(s) of letters are in the word “OPERATIONS” which has as many letters between them (both forward and backward) as in the English a...
If all the prime digits of the number 7584969684 are written first (in increasing order) followed by even digits(in increasing order) and then odd digit...
If all the digits of the number 986947638 are arranged in decreasing order, then sum of 5th and 6th digits (from the left end) of ...
Which of the following letter will be 5th letter from the right end if the letters of the word “LUMINOUS” are arranged in reverse alphabe...
What is the common term for the core infrastructure of the Internet?
How many pairs of letters are there in the word “CHAMOMILE” which has as many letters between them in the word as in the alphabetical series?
...If in the number '4359672', 1 is subtracted from all the odd digits and 2 is added to all the even digits then all the numbers which are repeated are de...
If all the letters in the word ‘APPLAUSE’ are arranged in alphabetical order from left to right such that the vowels are arranged first followed ...
If we arrange all the digits of the number “67258431” in ascending order from left end, then what will be the sum of 5th number from the right end ...
Which of the following letter will be 7th letter from the left end if the letters at odd positions are replaced by succeeding letter in the word “WIM...
Relevant for Exams:
