Question
Three pipes are connected to a cistern such that pipes A
and B can fill the cistern in 12 minutes and 18 minutes respectively, and pipe C can empty the cistern in 24 minutes. If all the pipes are opened together and pipe B is closed after a certain time, the total time taken to fill the cistern is 15 minutes. Find after how many minutes pipe B should be closed.Solution
ATQ, 15/12 + x/18 – 15/24 = 1 (90 + 4x – 45) /72 = 1 45 + 4x = 72 4x = 27 x = 6.75 or 6 mins 75 secs
Select the most appropriate option to fill in the blank.
We’ll accept your application _______ you fulfil all the conditions.
The startup is growing quickly, but they need to ensure they don’t _______ and make careless mistakes.
There are _____________ passages in the system, but it is now rapidly becoming a major thoroughfare.
They have to _____________ with elephants, hippos, bushpigs, porcupines, vervet monkeys, baboons and birds which are after their crops.    Â
...Fill in the blank/s with suitable Word/s:
The company plans to _________ its services and _________ its customer base.
The artist's work is a _________ of colors and shapes, evoking a sense of wonder and curiosity.
Select the most appropriate word to fill in the blank.
Let us know ______ you change your mind.
Fill in the blank/s with suitable Word/s:
The company will _________ a new product and _________ it in international markets.
I __________ faith in goodness and deep kindness and so did my siblings.
Select the most appropriate homophone to fill in the blank.
 In many road accidents people break their bones mainly because their vehicle __...
