Question
Pipe A can fill a tank in 45 minutes while pipe B can
fill it in ____ minutes. There’s a leak in the tank which can empty it in _____minutes. When both the pipes are open, due to the effect of the leak, the tank gets filled in 30 minutes. Which of the following values can fill the blanks in the same order? I. 60, 80 II. 70, 50 III. 45, 90 IV. 36, 60Solution
From I: Portion of tank filled in a minute = 1/45 + 1/60 - 1/80 = (16 + 12 – 9)/720 = 19/720 Hence, I does not follow From II: Portion of the tank filled in a minute 1/45 + 1/70 – 1/50 = (70+45-63)/3150 = 52/3150 Hence II also does not follow. From III: Portion of the tank filled in a minute. = 1/45 + 1/45 – 1/90 = (2 + 2 – 1)/90 = 3/90 = 1/30 From IV: Portion of the tank filled in a minute = 1/45 + 1/36 – 1/60 = (4 + 5 – 3)/180 = 6/180 = 1/30 Hence only III and IV satisfy the given blanks.
Who among the following was appointed as the Director of the National Science Foundation in USA?
Which country among the following is not a member of the Colombo Security Conclave?
Who became the Nawab of Bengal after the death of Alivardi Khan in the year 1756?
Which country has launched the permanent residency scheme (Golden Card) to woo wealthy individuals and exceptional talents?
How many different words can be formed with the letters of the word NAINITAL such that each of the word begin with L and end with T ?
In which year was The Reserve Bank of India was established?
The Legal Entity Identifier (LEI) system is primarily used to identify:
Which city is called as mini – Harappa?
Which of the following pairs is not correctly matched?
Which among the following ports in India has been renamed as Deendayal Port?
Relevant for Exams:
