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Dimension of room is 8mx5m
         area of room =8*5m²=40 m²
Area of building including Verandah= (8+4)*(5+4)m²
Area of Verandah=108-40 = 68m²
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Area of building including Verandah= (8+4)*(5+4)m²
how did u got this step
plzzzzzzzzz explain
After adding varandah on both sides length becomes 8+2+2=12m
Similarly width becomes 5+2+2=9 m
Solution :
           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.
       Therefore ,

Area of Varandah = total area of room including varandah - area of Room .
                             = 108 m² - 40m²

Hope This helps You!!

Thank You!!
Cheers !!
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