Question

a room is 10 metre long 6 metre wide and 4.2 metre height . it has one door of 2.5m * 1.5m and one window of dimension 1.5m * 1 m. find the cost of whitewashing the wall at rupees 2.50 per sq. m.​

Answer 1

Answer:

Step-by-step explanation:

2 ( l + b )h

2 ( 10 + 6 ) 4.2

2(16) 4.2

32*4.2

134.4 cm  square

area of one door + area of one window

2.5*1.5 + 1.5*1

3.75 +1.5

5.25 cm square

the area of whitewashing = 134.4 - 5.25

129.15 cm square

the cost of whitewashing the wall at rupees 2.50 per square

= 129.15 * 2.50

322.875 rupees

323 rupees