Question

the dimensions of the room are 12.5 m by 9m by 7m. there are 2 doors and 4 windows in the room; each door measures 2.5 by 1.2 and each window 1.5 by 1 m. find the cost of painting the walls at Rs. 3.50 per sq.m​

Answer 1

Answer:

Step-by-step explanation:

here's ur answer...

length of the room=12.5m

breadth=9m

height=7m

we have to find it's CSA because we have to find the cost of painting walls.

CSA=2h(l+b)

=2×7(12.5+9)

=14×21.5

=301m²

area of both doors=2(l×b)

=2(2.4×1.5)

=2×3.6

=7.2m²

area of three doors=3(l×b)

=3(1.4×1.2)

=3×1.68

=5.04m²

area of wall without any doors and windows=

301-(7.2+5.04)

=301-12.24

=288.76m²

total cost=288.76×3.5

=₹1010.66

hope this helps....