Question

11. A door of length 2.5 m and breadth 1 m is fitted in a wall. The length of the wall is 3.5 m and breadth
is 2.8 m. Find the cost of white washing the wall, if the rate of white washing the wall is 25 per m2
12 Find the value of r when​

Answer 1

Answer:

132.5

Step-by-step explanation:

11. Area of wall =

$(3.5 \times 2.8) {m}^{2} \\ =9.8 {m}^{2}$

Area of door =

$(2.5 \times 1) {m}^{2} \\ = 2.5 {m}^{2}$

Area to be white washed =

$(9.8 - 2.5) {m}^{2} \\ = 5.3 \: {m}^{2}$

Cost of white washing =

$25 \times 5.3 \\ = 132.5$