Question

please give me correct answer.​

Answer 1

Step-by-step explanation:

Given:-

A room 15 m,12m and 3 m of dimensions and the cost of four walls of a room per sq.m is 10 rupees for roof to white wash is 5 rupees per 1 sq.m and floor is to fixed with granite rs 70 per sq m.

To find:-

Total cost of the room for all.

Solution:-

Length of the room(l)=15m

Breadth of the room (b)=12 m

Height of the room(h)=3 m

Area of the four walls of the room=2h(l+b) sq.units

=>2(3)(15+12)

=>6(27)

=>162 sq.m

The cost for painting the four walls per 1 sq.m=10

Cost for painting the four walls of 162 sq.m=162×10=Rs.1620

And

Area of the roof =l×b

=>15×12

=>180 sq.m

The cost for white washing the roof per

1 sq.m=Rs.5

Cost of 180 sq.m=180×5=900

Area of the floor =lb

=>15×12

=>180 sq.m

Cost for fixing granite to the floor per 1 sq.m

=Rs. 70

Cost for fixing the floor of 180 sq.m

=>180×70

=>Rs. 12600

Total cost of all=1620+900+12600

=>15120

Answer:-

The total cost =Rs.15120