Question
A tank has two inlet pipes, A and B, and one outlet
pipe, C. Pipe A can fill the tank in 6 hours, and pipe B can fill the tank in 8 hours. Pipe C can empty the tank in 12 hours. If all three pipes are opened simultaneously, how long will it take to fill the tank completely?Solution
Work done by Pipe A in 1 hour = 1/6 Work done by Pipe B in 1 hour = 1/8 Work done by Pipe C in 1 hour = -1/12 (negative because it empties the tank) Net work done in 1 hour = (1/6) + (1/8) - (1/12) = (4/24) + (3/24) - (2/24) = 5/24 Time to fill the tank = 1 / (5/24) = 24/5 = 4.8 hours = 4 hours 48 minutes Correct Option: b
Mammoth
 Fill in the blanks with the appropriate antonym of the word in Italic from the options given:
His optimistic outlook was replaced by _______ ...
TRANSFORM
In each of the following questions, three out of four words given have the same meaning. Mark the number as your answer which is different in meaning ...
Which pair is wrongly matched?
Select the most appropriate synonym of the given word.
Regime
Select the correct conclusion based on the meaning of the highlighted word:
Statement: The trade embargo has impacted export revenue.
Conc...
- Choose the word opposite in meaning to the bold word.
Turbulent Pick an antonym for the word given from the options given below.
Plethora
Choose the one which best expresses the meaning of the given word .
Precarious
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