Question

The Length breadth and height of a room are 5 metre 4 m 3 M respectively . find the cost of white washing the inner of the room and ceiling at the rate of rupees 50 per square metre

Answer 1

Given,

length of a room = 5m

breadth of the room = 4m

height of the room = 3m

Therefore, Area of four walls = 2h ( l + b )

= 2 ×3 ( 4m + 5m )

= 6 ( 9 )

= 54 Sq m

Area of ceiling = lb [ beacause the ceiling is in rectangular shape ]

= 5m * 4m

= 20 Sqm

So, Total area = area of four walls + area of ceiling

= 54 Sqm + 20 Sqm

= 74 Sqm

Cost of white-washing 1 Sqm = Rs 50

Cost of white washing 74 Sqm = Rs 50 × 74 Sqm

= Rs 3700 /-