Question

Length breadth and height of a room is 10m, 7m and 5m find the cost of painting if if it cost 18 rupees per metre square​

Answer 1

Answer:

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GIVEN

length :- 10m

Breath :- 7m

height :- 5m

and it charges ₹18 for 5m² paint

so,

Area of room = 2 ( lb + bh + hl )

= 2 [ (10×7) + ( 7×5 ) + (5×10) ]

= 2 [ 70 + 35 + 50 ]

= 2 [ 155 ]

= 310m²

if the 5m² costs ₹18 then how much it cost for 310m² ?

= $\frac{310m²}{5m²}$

= ₹62

therefore , ₹62 cost for the whole room

Answer 2

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