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Let the speed of the boat in still water = 'x' km/h Then, upstream and downstream speed of the boat are (x - 2) km/h and (x + 2) km/h, respectively According to the question, {56/(x - 2)} - {45/(x + y)} = (75/60) Or, (56x + 112 - 45x + 90) ÷ (x2 - 4) = 1.25 Or, 11x + 202 = 1.25x2 - 5 Or, 1.25x2 - 11x - 207 = 0 Or, 5x2 - 44x - 828 = 0 Or, 5x2 - 90x + 46x - 828 = 0 Or, 5x(x - 18) + 46(x - 18) = 0 Or, (5x + 46)(x - 18) = 0 So, x = 18 (since speed cannot be negative). Therefore, upstream and downstream speed of the boat is 16 km/h and 20 km/h Total distance travelled = 16 X (90/60) + 20 X (110/60) = 24 + (110/3) = (182/3) km
Select the correct combination of mathematical signs to sequentially replace the * signs and to balance the given equation.
12 * 24 * 4 * 2 * 60
MATTER : VIXXEQ :: ORDER : ?
If 21 @ 16 = 12 and 30 @ 25 = 12, then 22 @ 17 = ?'. What will come in place of question mark?
Select the option that is related to the third term in the same way as the second term is related to the first term.
AOE : FUJ :: RKT : ?
Select the related word/letters/number from the given alternatives.
AC : ZX :: GJ : (?)
If 4593 = 63, 7658 = 78, 885 = 63, then 9783 = ?
Select the option that is related to the fourth letter-cluster in the same way the second letter-cluster is related to the first letter-cluster.
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Select the option that is related to the fourth term in the same way as the irst term is related to the second term.
ENWQ: DPTU :: CBUT : ?
Select the option that is related to the third term in the same way as the second term is related to first term and the sixth term is related to the fif...
