Question

If xy=yx and y=2x then the value of y will be​

Answer 1

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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Answer 2

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.....