Question
Pipe ‘A’ can fill a tank in 12 hours while pipe
‘B’ takes 15 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 10 hours pipe ‘B’ is also opened. In how much time will the tank get filled completely?Solution
Let the total capacity of the tank be 60 units Efficiency of pipe ‘A’ = 60/12 = 5 units/hour Efficiency of pipe ‘B’ = 60/15 = 4 units/hour Tank filled in 10 hours = 10 × 5 = 50 units Therefore, required time taken to fill the remaining tank = (60 – 50)/(5 – 4) = 10 hours Therefore, total time taken = 10 + 10 = 20 hours
Fill in the blanks with the appropriate antonym of the word in Italic from the options given:
His optimistic outlook was replaced by _______ ...
Absolve
His speech was articulate and well-delivered.
The river was shallow near the shore.
Ammeter : Current :: Altimeter : ?
Select the most appropriate antonym of the given word.
Cheerful
- Each of the following questions consists of two words which have a relationship to each other. This is followed by four pairs of related words. Choose the ...
Select the most appropriate synonym of the given word.
DETAIN
- Choose the word opposite in meaning to the bold word.
Benign Something that can be very easily broken.
