Question

7. A hall has four walls, each measuring 11.5 m * 7.2 m. It has two doors of height 2 m and
width 1 m. It also has three windows of size 1 m * 0.5 m. Find the cost of whitewashing
the walls at the rate of 65 per square metre.​

Answer 1

Answer:

11.5*7.2*4=331.2

2*1*2=4

1*.5*3=1.5

4+1.5=5.5

331.2-5.5=325.7

325.7*65=21170.5

Answer 2

Answer:

Step-by-step explanation:

We will take the area first

11.5 * 7.2 = 82.8 m2

82.8 * 4 ( there are 4 walls) = 331.2

there are 2 doors and 3 windows

doors = 2 m2 * 2 = 4 m2

windows = 0.5 m2 *3 = 1.5 m2

82.8-5.5

= 77.3 m2

rate of whitewashing = 77.3 *65 = 5024.5

rs 5024.5 = rate of whitewashing