Question

Length of a box is four times its height and its breadth is 3 times its height. The cost of white washing the walls at the rate of rs4 per meter sq. is rs6. Find the cost of tiling the floor at the rate of rs10 per m sq.​

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Asked on December 20, 2019 by

Priyanshi Desai

Length of class-room is two times its height and breadth is 1

2

1

times its height. The cost of white washing the walls at the rate of Rs.1.60 per m

2

is Rs.179.20. Find the cost of tiling the floor at the rate of Rs.6.75 per m

2

.

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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

Step-by-step explanation:

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