Question

A rectangular room is 9 m long, 8 m wide and 6 m high. Find the cost of white
washing its walls and the roof at 8.50 per square metre. please give step by step answer ​

Answer 1

Step-by-step explanation:

Given,

Length of room =6m

Breadth of room =5m

Height of room =3.5m

So, Area of four walls =2(+b)×h=2(6+5)×3.5=77m

2

Area of 2 doors and 3 windows =(2×1.1×2+3×1.5×1.4)=(44+6.3)m

2

=10.7m

2

Area of ceiling =l×b=6×5=30m

2

Thus, total area for whitewashing =(77−10.7+30)m

2

=96.3m

2

Hence, the cost of whitewashing =Rs.(96.3×5.30)=Rs.510.39

Answer 2

Step-by-step explanation:

$answer$

Refer to the above attachment ⬆️⬆️.