In a trapezium PQRS, PQ || SR, PQSR. X and Y are the midpoints of SP and QR respectively. If XY = 7.5 and PQ = 12, then find RS.
Here is the answer for your question:
Consider the following figure
Given PQ|| SR,
Where PQ = 12units, XR = 7.5units, SR= ?
Using the formula:
XY = (PQ+SR)/2
7.5 = (12+SR)/2
SR = 3 units