Area of Room = 8*5 = 40 m²
Total Area of Room Including Varandah = (8+2+2)*(5+2+2)= 12*9 =108m²
NOte :- Because Room is a rectangle and the varandah of 2 m is constructed all around a room , therefore dimensions of the room including varandah will become 8+2+2 = 12m and 5+2+2 = 9 m.
Area of Varandah = total area of room including varandah - area of Room .
= 108 m² - 40m²
Hope This helps You!!