Answer:
Option (3)
Step-by-step explanation:
From the picture attached,
Area of the green shaded region = Area of triangle ADC + Area of triangle ABE
Area of triangle ADC = ![\frac{1}{2}(\text{Base})(\text{Height})](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%28%5Ctext%7BBase%7D%29%28%5Ctext%7BHeight%7D%29)
= ![\frac{1}{2}(AD)(DC)](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%28AD%29%28DC%29)
= ![\frac{1}{2}(12)(8)](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%2812%29%288%29)
= 48 square units
Area of triangle ABE = ![\frac{1}{2}(AB)(BE)](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%28AB%29%28BE%29)
= ![\frac{1}{2}(12)(8-3)](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%2812%29%288-3%29)
= 30 square units
Area of green shaded region = 48 + 30 = 78 square units
Option (3) will be the answer.
If it takes .1 hours to walk 2/6 miles, then it takes one hour to walk 20/6 miles.
20/6 miles = 3.33 miles
So that is 3.33 miles per hour.