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Q:

# A room is half as long again as it is broad. The cost of carpeting the at Rs. 5 per sq.m is Rs. 270 and the cost of papering the four walls at Rs. 10 per sq.m is Rs. 1720. If a door and 2 windows occupy 8 sq. m, find the dimensions of the room.

 A) b=6; l=18; H=6 B) b=5; l=6; H=18 C) l=6; b=18; H=15 D) l=5; b=18; H=18

Answer:   A) b=6; l=18; H=6

Explanation:

Let breadth = x metres, length = 3x metres, height = H metres.

Area of the floor=(Total cost of carpeting)/(Rate) = (270/5) sq.m = 54 sq.m

$x×3x2=54⇒x2=54×2⇒x=6$

So, breadth = 6 m and length =$362$ = 9 m.

Now, papered area = (1720/10) =  172 sq.m

Area of 1 door and 2 windows = 8 sq.m

Total area of 4 walls = (172 + 8) sq.m = 180 sq.m

$2×9+6H=180⇒H=6$

Subject: Area
Exam Prep: Bank Exams
Job Role: Bank PO
Q:

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 A) 60 sq.cm B) 180 sq.cm C) 210 sq.cm D) 240 sq.cm

Answer & Explanation Answer: D) 240 sq.cm

Explanation:
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4 4654
Q:

∆ABC is right angled at B. If cosA = 8/17, then what is the value of cotC ?

 A)  15/8 B) 15/17 C)  8/17 D) 17/15

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Explanation:
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The curved surface area and the diameter of a right circular cylinder are 660 sq.cm and 21 cm respectively. Find its height (in cm).

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Explanation:
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If the measure of the interior angle of a regular polygon is $1800$, then how many sides does it have?

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Answer & Explanation Answer: C) 27 units

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Q:

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Answer & Explanation Answer: C) 396

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Q:

Find the curved surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.

 A)  792 B) 728 C)  528 D)  493

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In ΔABC measure of angle B is $900$. If cotA = 8/15, and AB = 0.8cm, then what is the length (in cm) of side BC?

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Answer & Explanation Answer: C)  1.5

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0 559