Question

a room is 9m long 7m broad it has one door measuring ( 1.5 m ×1.5m ). the cost of painting the walls of the room at ₹50 per sq m is ₹7925 .find the height of the room​

Answer 1

I hope u will get help from it........

Answer 2

Answer:

$cost \: = \: 7925$

$lsa + celling - door$

$2h(l + b) \: + lb - 1 \times 1.5$

$2h(9 + 7) + (9 \times 7) - 1.5$

$32h + 63 - 1.5$

$(32h + 61.5)m sq$

1 meter sq = 50 rupees

(32h +61.5 metre sq = 7925

1/50=32h + 61.5/7925

64h + 123/317 =1

64h+123=317

64 h = 317 -123

64h = 194

=3.03 metre.......

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