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Let the tank capacity be 150 litres (LCM of 25 and 30) So, Pipe P can fill it in 25 hours therefore, Pipe P can fill per hours = 150/25 = 6 litres Pipe Q can emptied it in 30 hours = 150/30 = 5 litres Tank filled after 2 hours = 6 - 5 = 1 litres (If pipes open alternatively) In last hour pipe P fill tank 6 litres So rest part of tank needed to be filled is = 150 - 6 = 144 litres In 2 hours tank filled = 1 litres So, 144 litres to be filled in = 144 × 2 = 288 therefore, So total time = 288 + 1 = 289 hours
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How many such pairs of letters are there in the word ‘DEPARTMENT’ each of which has as many letters between them in the word as in the English alpha...
How many pairs of letters are there in the word “CORPORATION” which has as many letters between them in the word as in the English alphabetical seri...
If it was Friday on 12th Jan, 1886 what was the day on 22th Jan, 1889 ? ...
If one is added to all the even digits and two is subtracted from all the odd digits of the number 3984525783, after that all the digits are arranged in...
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 ...