exam Maths Puzzle Numerical Ability

Segment RS is the perpendicular bisector of segment XY, but segment XY is not the perpendicular bisector of segment RS. (We are suppose to draw a figure to represnt this sentence)

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exam Other Question

One of two supplementary angles is 30 degrees more than twice the other.
Find the angles.

please and
Thank you!! when a sound travels through water, the distance y in meters that the sound travels in x seconds is given by the wquation y=1440x.

How far does a soun travel underwater in 5 sec