What is the perimeter of a rectangular field whose diagonal is 10m and length is 3m ? Choose one
A) 12 m B) 5 m C) 10 m D) 8 m E) 6 m

Rationale: sol : breadth of the rectangular plot is = 10 ^ 2 - 3 ^ 2 = 1 m therefore , perimeter of the rectangular plot = 2 ( 3 + 1 ) = 8 m d ) 8 m
Answer: D