Question
When travelling with the current, a man takes 5 hours
to cover the distance that he would've covered in 15 hours while travelling against the current. If the current flows at 8 km/h, then find the time taken by the boat to cover 24 km in still water.Solution
Let the speed of the boat in still water be 'x' km/hr Therefore, distance covered in upstream = 15 X (x - 8) km Also, distance covered in downstream = 5 X (x + 8) km According to the question, 15 X (x - 8) = 5 X (x + 8) Or, {(x + 8)/(x - 8)} = (15/5) = (3/1) Or, x + 8 = 3x - 24 Or, 2x = 32 => 'x' = 16 So, speed of the boat in still water = 16 km/h So, required time = (24/16) X 60 = 90 minutes
 In expression ‘X $ U & V @ P # Q % R $ S & T’ who is the only daughter of V?Â
If G – I + H, which of the following statement is true?
If B is the daughter of F’s brother in law, then which of the following expression is true?
Answer the following question based on the direction given below.
If 'A#B' means 'A is father of B'
'A@B' means 'A is daughter of B'...
How is T related to S?
'A # B' means 'A is the husband of B'. 'A @ B' means 'A is the mother of B'. 'A & B' means 'A is the sister of B'. 'A $ B' means 'A is the child of B'. ...
In a certain code language,
'A + B' means 'A is the mother of B',
'A - B' means 'A is the father of B',
'A $ B' means 'A is ...
If J # K & L % M @ I % H then how is I related to K?
If X & Y means X is married to Y, X ^ Y means X is father of Y, X @ Y means X is mother of Y, X % Y means X is sister of Y. If 'H & I ^ J % K @ L % M' i...
Which of the following is definitely true for B + C - D ÷ E + F - G ?
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