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Let the downstream speed and upstream speed of boat be 3x km/hr and 2x km/hr
So, the upstream speed of boat = (180/15) = 12 km/hr
So, 12 = 2x
So, 'x' = 6
So, the speed of boat in still water = {(3x + 2x) /2} = 2.5x
= 2.5 X 6 = 15 km/hr
In a mixture 'P', 5 liters of water are replaced with honey, resulting in the mixture containing 55% honey. If the original mixtu...
The mean deviation of the data 3, 10, 10, 4, 7, 10, 5 is:
The value of λ for which the 2 vectors 2i – j + 2k and 3i + λ j + k are perpendicular is
What is the value of`(0.55xx4.5)/(0.81) ?`
By which of the following symbol all Excel formula starts?
Simplify: (2x)²-(2y)²-(4x)²
The number of five–digit telephone numbers having at least one of their digits repeated is
Main function of CPU is
Select the option that is related to the third number in the same way as the second number is related to the first number.
12 : 60 :: 16 : ?
24.89² ÷ (34.33 ÷ 20.02) + 67.85 – 89.01 = ?