Question
Pipe 'A' can fill a tank in 20 hours. Pipe 'B' is ____% as
efficient as pipe 'A'. If both pipes are opened simultaneously, the tank will be completely full in ____hours.The values given in which of the following options will fill the blanks in the same order in which is it given to make the statement true: I. 25, 16 II. 100, 10 III. 150, 8Solution
Let the capacity of the tank be '100x' litres.
So, efficiency of pipe 'A' = 100x ÷ 20 = '5x' litres/hour
For: I Efficiency of pipe 'B' = 5x × 0.25 = '1.25x' litres/hour
Time taken by both pipes together to fill the tank = 100x ÷ (1.25x + 5x) = 100x ÷ 6.25x = 16 hours
Therefore, statement 'I' is true.
For: II
Efficiency of pipe 'B' = 5x × 1.00 = '5x' litres/hour
Time taken by both pipes together to fill the tank = 100x ÷ (5x + 5x) = 100x ÷ 10x = 10 hours
Therefore, statement 'II' is true.
For: III
Efficiency of pipe 'B' = 5x × 1.50 = '7.5x' litres/hour
Time taken by both pipes together to fill the tank = 100x ÷ (7.5x + 5x) = 100x ÷ 12.5x = 8 hours
Therefore, statement 'III' is true.
Arrange the given words in the sequence in which they occur in the dictionary.
A) Case
B) Cashier
C) Caselet
D) Cash
Select the word-pair in which the two words are related in the same way as are the two words in the following word-pair.
Butterflies : Lepidopterist
242, 288, ? , 392, 450
On which of the following days the RRB PO seminar was held?
If ‘+’ means ‘−‘, ‘−‘ means ‘×’, ‘÷’ means ‘+’, ‘×’ means ‘÷’, then what is the value of the following expressio...
Odd one out
Four number pairs have been given, out of which three are alike in some manner and one is different. Select the one that is different.
If + means −, − means ×, × means ÷, and ÷ means +, what will be the value of the following expression?
3 ÷ 6 + 3 – 4 × 4 = ?
...Which of the following boxes are placed in the lowermost shelf?
Select the option figure in which the given figure is embedded (rotation is NOT allowed).
