Question

A room is 10.2 m long, 8.5 m wide and 4.6 m
high. It has a door measuring 1.5 m x 2.6 m
and a window measuring 2 mx 1.7 m. Find
the cost of tiling the walls at the rate of
13.50 per sq. m.
(show length breadth and height in diagram also) ​

Answer 1

Answer:

2223.99 rs

Step-by-step explanation:

we need to find area of 4 walls then subtract the answer from the area of window + area of door and then multiply by 13.50

• area of 4 walls=2h(l+b)
• =2×4.6(10.2+8.5)
• =9.2×18.7
• =172.04 m square
• area of door = 1.5x2.6
• =3.9 m square
• area of window = 2x1.7
• =3.4 m square
• area to be tilled=172.04-(3.9+3.4)
• =172.04-7.3
• =164.74
• cost of tilling = 164.74×13.50
• =2223.99 rs

hope it helps

Answer 2

first we have to find CSA(curve surface area) of room

so,2(l+b)*h

=2(10.2+8.5)*4.6=172.04 sq. m.

Now,we have to find area of window and door

so, area of window + area of door

=2*1.7+1.5*2.6=7.3 sq. m.

now, subtract

172.04-7.3=164.74 sq.m

so rate=164.74*13.50=2223.99 RS.