Question

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A square room is 4 m high. The cost of carpeting its floor at Rs 50 per sq. metre is Rs 3200. Find the cost of painting its walls and ceiling at Rs 25 per sq. metre.​​

Answer 1

Step-by-step explanation:

vol is 4 power of 3 = 64 sq.m

25 RS per sq. m

for 64 sq. m is = 25*64 = RS 1600

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Answer 2

given:

A square room is 4 m high. The cost of carpeting its floor at Rs 50 per sq. metre is Rs 3200. Find the cost of painting its walls and ceiling at Rs 25 per sq. metre.

solution:

length= 2b

area of wall =

$\frac{64800}{140}$

(0 will cut)

2(l×b)+h

2×36×h=270

bh= 45m²

$area \: of \: celling \: = \frac{5000}{25} = 200$

l×b=200

→2b² =200

→ b= 10m

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