Speed of boat in still water is 7km/hour Let the Speed of Stream be x Km/hour 36/(7+x) + 36/(7-x) = 21 24 = 49- x2 x = 5 km/hour Now, the speed of Boat for the journey from A to B to take time 108 minutes is Speed of boat = y km/hour , Speed of stream = 5km/hour , Time = 108 minutes (y+5) = (36×60)/108 = 20km/hour y+5 = 20 y = 15km/hour ∴ Speed of Boat must be 15km/hour
In a secret language 7 is coded as E, 5 is coded as R, 2 is coded as A, 1 is coded as T, 4 is coded as 0, 6 is coded as L and 3 is coded as K. What does...
Which of the following of coded as ‘pik’?
In a certain code ‘RAIN’ is written as ‘10’ likewise ‘SEAT’ as ‘6’.How will you code ‘FOUR’ using the same coding logic?
...If ‘CLEAN’ is coded as ‘DNHES’, then what is the code for ‘ COURT ’?
In a certain code language, ‘FRIEND’ is coded as '42', ‘MAGIC’ is coded as '30'. How will be ‘FINE’ coded as in that language?
...If ‘MAX’ = 416, then ‘MANGO’ = (?)
How many such pair(s) of letters are in the word “TRANSPARENT” which has as many letters between them (both forward and backward) as in the English ...
If ‘HAMPER’ is coded as '22', ‘SURFACE’ is coded as '58', then what is the code for ‘PAPER’ in the same code language?
In a certain code language ‘WHOLE’ is coded as 46-16-30-24-10 and ‘FAINT’ is coded as 12-2-18-28-40. How will ‘SUPER’ be coded in that langu...
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