A 30-m tall flag pole and its shadow form the sides of a right triangle. On this particular day, the sun rises at 6 AM and sets at 6 PM. At what time of the morning (to the nearest minute) will the length of the shadow be exactly 40 m? (Hint: determine the angle of elevation of the sun)

Answer 1

H=Hight=30 m

L=Lenght of shadow

H/L=3/4=0.75

6AM+6PM=12 hours

12*(3/4)=36/4=9 hours

6AM+9hours=6AM+6hours+3hours=12AM+3hours=3PM