Question 743775
From 6.15 to 12.15 = 6hours = 360 mins
Using trig ratios  tan = opposite/adjacent  = 6 ft/ 4.2 ft = 55 degrees.
55 degrees/ 90 degrees = 0.611.
0.611 x 360 mins = 220 mins
220 mins/ 60 = 3 hours 40 mins
06.15 + 3.40 = 09.55