Question

length for classroom is 2 times its height and it's breadth is 1 1/2 times its height the cost of white washing the walls at the rate of ₹1.60 per square metre is ₹179.20. Find the cost of tiling the floor at the rate of ₹12.75 per square metre.​

Answer 1

Answer:

Let height of the room be 'h' m.

∴ length of the room=2hm

breadth of the room=

2

3

hm.

area of 4 walls=

1.60

179.20

=112m

2

2(l+b)×h=112

2(2h+

2

3

h)×h=112

2×

2

7

×h

2

=112

h

2

=

14

112×2

=16

h=

16

=4m

length=4×2=8m, breadth=

2

3

×4=6m

for, tiling the floor area=l×b=8×6=48m

cost of tiling=48×6.75=Rs.324