Question
A large reservoir can be filled by two pipes, A and B,
in 20 minutes and 30 minutes respectively. If both pipes are opened simultaneously, after how much time should pipe A be closed so that the remaining part of the reservoir is filled in 6 minutes by pipe B alone?Solution
ATQ, Both pipes are opened simultaneously. Let after 'y' minutes, pipe A be closed. Then, the equation for the fill rate when both pipes are open and when pipe B finishes the job alone is: 
Pipe A should be closed after 9.6 minutes.
Read each sentence to find out whether there is any grammatical error in it. Mark the part with the error as your answer.Â
If that ruler is (...
spiny-skinned invertebrates that are found on the ocean floor
Find the appropriate answer.
An unexpected piece of good fortune Â
Choose the one which best expresses the meaning of the given word .
Fleeting
Choose the word which is opposite in meaning to the word - Congenial
He is very humble about his achievements.
Choose the option that is an antonym of the word in capitals.
 The boy is PUNISHED and so cannot go out to play with his friends.
- In the following sentence, choose the word similar in meaning to the bold word to fill in the blank.
Her happy demeanor and ___________attitude bri... In the following question, four words have been given out of which one word is incorrectly spelt. Select the incorrectly spelt word.
Relevant for Exams:
