CGL 21 Tier 2 Maths


Question 1

ABCDEEF is a regular hexagon. Side of the hexagon is 36 cm. What is the area of the triangle ABC?

ABCDEEF एक सम षट्भुज है। षट्भुज की भुजा 36 से.मी. है। त्रिभुज ABC का क्षेत्रफल क्या है?


Options

A

2403\sqrt{3} cm2

2403\sqrt{3} cm2

B

3243\sqrt{3} cm2

3243\sqrt{3} cm2

C

3603\sqrt{3} cm2

3603\sqrt{3} cm2

D

1923\sqrt{3} cm2

1923\sqrt{3} cm2


Solution:

Correct Answer:

B

3243\sqrt{3} cm2

3243\sqrt{3} से.मी2


Side of the hexagon ABCDEF = a = 36 cm

Area of triangle ABC = 2 ×\times Area of triangle ABG = 2 ×\times 12\frac{1}{2} ×\times AG ×\times BG =  183\sqrt{3} ×\times 18  = 3243\sqrt{3} cm2

ABCDEF सम षट्भुज की भुजा = a = 36 cm

 त्रिभुज ABC का क्षेत्रफल = 2 ×\times त्रिभुज ABG का क्षेत्रफल = 2 ×\times 12\frac{1}{2} ×\times AG ×\times BG =  183\sqrt{3} ×\times 18  = 3243\sqrt{3} से.मी2

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