a classroom is 8m long , 7m broad, and 4.5 m high.
doors and window occupy an area of 18 meter sq.
find the cost of whitewashing the walls at the rate of 2.50 rs sq.m
please do it fast
Answers
Answered by
0
Answer:
It will cost 572.5 Rs.
Step-by-step explanation:
Given:
shape of classroom is cuboid
length:8m
breadth:7m
height:4.5m
Solution:
First we need to find total surface area of cuboid
TSA of cuboid = 2× {( l×b )+( b×h )+( l×h )}
=2× {( 8×7 )+( 7×4.5 )+( 8×4.5)}
= 2× { 56 + 31.5 + 36 }
= 2× 123.5
= 247 sq m
Door and windows occupy an area of 18 meater sq. Therefore paint will be not applied on it.
=247 -18
=229 sq m
It cost 2.50 Rs/ sq m
Therefore paint applied on 229 sq m will be
=229 × 2.50
=572.5 Rs
Ans:It will cost 572.5 Rs to paint classroom.
Answered by
0
Answer:
DWQINNNNNNXEBU1IEW1SQDJMK
Step-by-step explanation:
Similar questions