Question
Two pipes, A and B, together can fill a tank in 24
minutes. Both the pipes were opened together, but pipe A, which can fill the tank in 40 minutes, was closed 30 minutes before the tank got filled. In how many minutes did the tank get filled?Solution
Pipes A and B, together can fill a tank in 24 minutes Pipe A can fill the tank in 40 minutes Let the total capacity of tank be 120 (LCM of 24 and 40) (A + B)'s efficency = 120/24 = 5 A's efficency = 120/40 = 3  B's efficiency = 5 - 3 = 2 Now, Tank filled by B when A is closed = 30 × 2 = 60 so A and B filled the tank before A was closed = 60/5 = 12 min therefore, tank can be filled in 30 + 12 = 42 min
Find the next term / numbers in the given series?
54, 46, 40, 36, ?
- Study the given pattern carefully and select the number that can replace the question mark [?] in it.
First row: 11, 7, 1274
Second row: 9, ... Study the given pattern carefully and select the number that can replace the question mark (?) in it.
First row: 14, 12, 108
Second row:...
In the following expression find the missing term:
A series is given with two terms missing. Choose the correct alternatives from the given ones that will come in the place of blanks respectively and com...
UDGO : FWTL : : MXRC : ?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
What will come in the place of question mark?
Find the missing number.
E/M ∶ 20/156: : G/O: ?
