From a point P on the ground the angles of elevation of the top of a 10 m tall building is 30°. A flag is hoisted at the top of the building and the angle of elevation of the top of the flagstaff from P is 45° Find the length of the flagstaff. (Take 3 = 1.732)

• A. 10( 3 + 2) m
• B. 10( 3 + 1) m
• C. 10 3 m
• D. 7.32 m