Aptitude - Area - Discussion

Discussion Forum : Area - General Questions (Q.No. 15)
15.
A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:
Rs. 456
Rs. 458
Rs. 558
Rs. 568
Answer: Option
Explanation:

Area to be plastered = [2(l + b) x h] + (l x b)
= {[2(25 + 12) x 6] + (25 x 12)} m2
= (444 + 300) m2
= 744 m2.

Cost of plastering = Rs. 744 x 75 = Rs. 558.
100

Discussion:
24 comments Page 3 of 3.

Naimulsamad said:   9 years ago
Thanks to all. Now it's easy to understand.

Akbn said:   9 years ago
Yes, 558 is the correct answer.

Mahesh said:   2 decades ago
Why (l x b) is there again?

Koks said:   6 years ago
How come 75/100?
(1)


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