Q.44 see image...............................................................

this is an extremely ez ques.

use sinA/a= sinB/b= sinC/c= 1/2R first on triangle ABD nd then on ACD. obviously you will have to consider all properties of a rhombus like all sides are equal and diagonal bisects the angles through which it passes.

eqns are 50sinp= a and 25cosp= a solve these together.

finally area= 4*area of one quarter triangle= 4* ½ * acosp * asinp where a is side and p is half of BAC.

= 2a^2cospsinp

= (20)^2

= 400