Which one of the following Venn - diagrams best illustrates

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RRB TC CC Exam (Bangalore) 2006 click here to view all questions

Which one of the following Venn - diagrams best illustrates the three classes :Rhombus, Quadrilaterals, Polygons?

A

B

C

D

Sachin Khr ? Nov 18 '2016 at 22:12

A Venn diagram uses overlapping circles to show relationships between groups of objects. All "quadrilaterals" can be separated into three sub-groups: general quadrilaterals, parallelograms and trapezoids.
All rhombus are quadrilaterals.All quadrilaterals are polygons.

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A man is walking in a rectangular field whose perimeter is 6 km. If the area of rectangular field be 2 sq km, then what is the difference between the length and breadth of the rectangle?

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RRB TC CC Exam (Bangalore) 2006 click here to view all questions

A man is walking in a rectangular field whose perimeter is 6 km. If the area of rectangular field be 2 sq km, then what is the difference between the length and breadth of the rectangle?

A½km

B1 km

C1½km

D2 km

Sachin Khr ? Nov 18 '2016 at 20:41

Answer is : 1Km
Let the length and breadth of the rectangular field be a and b km. respectively. 
Then, 2(a+b)=6 
\(a+b=3 ----------(i)\)
and 
\(ab=2 -----------(ii) \)
Now, 
\((a-b)^2=(a+b)^2-4ab \)

\((a-b)^2= 3^2- 4 *2\)

\((a-b)^2=9-8\)
\((a-b)^2=1\)

\((a-b) =1\)

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A room is 12 (1/4) m long and 7m wide. The maximum length of

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RRB TC CC Exam (Patna) 2006 click here to view all questions

A room is 12 (1/4) m long and 7m wide. The maximum lenght of a square tile to fill 4 the floor of room with whole number of tiles, should be

A200 cm

B175 cm

C125 cm

D150 cm

shyam ? Dec 20 '2019 at 10:41

Correct answer is: 175 cm

Explanation:

l = 1225cm and b= 700cm 

Maximum length of the square tile 

= H.C.F of (1225cm , 700cm) = 175cm

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The area of a circle is 1386 m^2. Find its circumference.

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RRB TC CC Exam (Bangalore) 2007 click here to view all questions

The area of a circle is 1386 m^2. Find its circumference.

A444 m

B70 m

C132 m

D19 m

Nithin K ? Sun Sep 25 2016 12:30:00 GMT+0530 (IST)

Given area of circular field is 1386 m2
But area of circle = πr²
∴ πr² = 1386
r² = \(1386 \times 7 \over 22 \)

r²= 441 m

r = \(\sqrt{441} \)m
∴  r = 21 m
Circumference of the field = 2πr = 2 x \(22 \over 7\)x 21 = 132m.

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The sides of a rectangle are 8 cm and 6 cm. The corners of

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RRB TC CC Exam (Bangalore) 2007 click here to view all questions

The sides of a rectangle are 8 cm and 6 cm. The corners of the rectangle lie on a circle. Find the area of circle without the rectangle.

A30.6

B39

C42.4

D65.3

Nithin K ? Nov 26 '2016 at 13:57

Answer is: 30.6 

Explanation:

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