Pipe ‘A’ can fill a tank in 30 hours whereas leak ‘A’ can empty it in 40 hours. If they both operate along with pipe ‘B’, then the given tank gets filled in 15 hours. How much time is needed to fill the given tank if pipe ‘B’ and leak ‘A’ work together?
Let the capacity of the tank be 120 litres {LCM (30 and 40)} Efficiency of pipe ‘A’ = 120 ÷ 30 = 4 litres/hour Efficiency of leak ‘A’ = 120 ÷ 40 = 3 litres/hour Combined efficiency of pipe ‘A’ and leak ‘A’ = 4 – 3 = 1 litre/hour Combined efficiency of pipe ‘A’, ‘B’ and leak ‘A’ = 120 ÷ 15 = 8 units/hour Efficiency of pipe ‘B’ = 8 – 1 = 7 units/hour Time taken by pipe ‘B’ and leak ‘A’ to fill the tank = 120 ÷ (7 – 3) = 30 hours
In a certain code language, ‘WE’ is written as ‘14’, ‘OUT’ is written as ‘28’. What is the code for ‘WAR’ in that code language?
Select the correct option that indicates the arrangement of the given words in the order in which they appear in an English dictionary.
1. Realis...
Select the option that represents the letters that, when sequentially placed from left to right in the blanks below, will complete the letter series.
Which two signs should be interchanged to make the given equation correct?
32 + 14 × 3 – 91 ÷ 7 = 3
Venu, Sonia, Kamal, Ria and Aish are sitting on a bench. Sonia is sitting to the right of Kamal, who is not sitting at extreme end of the bend. Ria is s...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
statement:
Residents of this region are frequently faced with incidents of sudden power surges and voltage surges which cause damage to sensitive...
Shamita's birthday was on 15 March 2020, which was a Sunday. If her husband's birthday was on 31 May 2020, on which day would it fall?
In accordance with the logic used in the first pair, replace the question mark with the appropriate option given to
4441 : 13 :: 3136 : ??
If A denotes ‘+’, B denotes ‘×’, C denotes ‘−’, and D denotes ‘÷’, then what will come in place of ‘?’ in the following equation...
