Question
Speed of a boat in still water is 9 km/hr. It goes 12 km
downstream and comes back to the starting point in three hours. What is the speed of water in the stream?Solution
Let the speed of the boat = 9km/hr Speed of current = x km/hr Speed upstream = (9 – x) km/hr Speed downstream = (9 + x) km/hr Time upstream + time downstream = 3 hours Time  = distance/(speed ) 12/(9-x)+  12/(9+x) = 3 x = 3 km/hrÂ
In a certain code language, 'CATHOLIC' is written as '79', 'AUDIENCE' is written as '70', how will 'ASSEMBLY' be written in that language?
Select the triad in which the numbers are related to each other in the same way as the numbers in the following triads.
8-17-35
23-47-95
If in a certain code SHORT is written as TJRVY, how will LONG be written in the same code?
If O = 16, FOR = 42, then what is FROM equal to?
The position of how many letters will remain unchanged if each of the letters in the word ‘PRANKED’ is arranged in the English alphabetical order? ...
If '+' means ×, '–' means ÷, '×' means + and '÷' means –, compute the value of the expression:
45 – 9 + 4 × 5
...In the following question, select the related letters from the given alternatives.
VN : AJ :: MD : ?
Looking at a portrait of a man, Varun said, "His mother is the wife of my father's son. Brothers and sisters I have none."At whose portrait was Varun lo...
Select the figure from among the given options that can replace the question mark (?) in the following series.
In a certain code language, the letters of the English alphabet are coded as per their alphabetical order (A as 1 and Z as 26). However, if a consonant ...
Relevant for Exams:
