Two pipes A and B can independently fil1 a tank completely in 20 and 30 minutes respectively, If both the pipes are opened simultaneously, how much time will they take to fill the tank completely ?
10 minutes
12 minutes
15 minutes
25 minutes
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy