If xy=yx and y=2x then the value of y will be
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Step-by-step explanation:
A pump empties a swimming pool in 40 minutes at the rate of 1400 L/min. If the rate of pumping is 2000 L/min, how long does it take to empty the swimming pool?
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Step-by-step explanation:
- xy=yx
Therefore:
x=y/2
xy=yx
y/2*y = 2x*x
y*y=2x*x *2
y^2 = 4x^2
y=√(4x^2)
y=2x
Hence Proved.....
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