From the following figure find value of XY if ∠AOB=∠XOY.
In the given figure, if XY=6 cm and ∠XOY=∠MON=85∘, then find the length of the chord MN in cm.
If 3+5+7+……+upto n terms5+8+11+……upto 10 terms=7, then find the value of n.