The Total solution for NCERT class 6-12
Given: Length of wall = 4.5 mBreadth of the wall = 3.6 mLength of the door = 2 mBreadth of the door = 1 mArea of the wall = l ├Ч b = 4.5 m ├Ч 3.6 m = 16.20 m2= 16.20 m2Area of the door = l ├Ч b = 2 m ├Ч 1 m = 2 m2тИ┤ Areaof the wall to be white washed = Area of the wall тАУ Area of the door= 16.20 m2┬атАУ 2 m2= 14.20 m2Cost of white washing= тВ╣ 14.20 ├Ч 20 = тВ╣ 284.00Hence, the required area = 14.20 m2┬аandthe required cost = тВ╣ 284