Question

a classroom is 7 metre long 6 metre broad and 4 metre Hive did doors and windows ago pay and area of 7 metre square find the cost of whites white was linked the wall and roof at the rate of 15 per metre square​

Answer 1

Answer:

ANSWER

TSA of the room = 2(lb+bh+hl) - area of the floor

=2(lb+bh+hl)−lb

=lb+2(bh+hl)

=lb+2h(l+b)

=7×6+2×4(7+6)

=42+8(13)

=42+104=146m

2

where

l=7m

b=6m

h=4m

cost of white washing per m

2

= Rs 15

cost of white washing 146 m

2

=146×15

= Rs 2,190