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ASHISH

· started a discussion

· 1 Months ago

Wrong Solution (Question: 451922.0 )

Why you have taken Area of Porch=(L + B - 2W)2W,
Porch is surrounded the area it should be area= (L + B + 2W)2W

Question:
A hall 25 metres long and 15 metres broad is surrounded by a porch of uniform width of 3.5 metres. The cost of flooring the porch at Rs. 27.50 per square metre is:
Options:
A) Rs. 9149.50
B) Rs. 8146.50
C) Rs. 9047.50
D) Rs. 4186.5 
Solution:

Ans.(c)

Area of porch

= (25+7) × (15+7) –25 × 15

= 704 – 375 = 329 

Cost of flooring = 329× 27.5

= Rs. 9047.50 (app.)

Knowledge Expert

· commented

· 1 Months ago

Dear student
Given solution is correct.
Please solve the question carefully.

Best wishes
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