A circular disc of radius 6 cm is divided into three sectors with central angles 120- 150- and 90- - The ratio of the arc of the three sectors isA- 4- 5- 3B- 3- 4- 5C- 6- 5- 4D- 4-5-6

The correct option is A 4:5:3 ...

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Standard IX

Mathematics

Intercept Theorem

A circular di...

Question

A circular disc of radius 6 cm is divided into three sectors with central angles 120^o, 150^o and 90^o. The ratio of the arc of the three sectors is

4:5:6

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4:5:3

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3:4:5

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6:5:4

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Solution

The correct option is B
4:5:3

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A circular disc of radius 6 cm is divided into three sectors with central angles 90^o, 120^oand 150^o. The ratio of the areas of the three sectors is

A circular disc of radius 6 cm is divided into three sectors with central angles $90^{\circ}, 120^{\circ} a n d 150^{\circ}$ . What part of the whole circle is the sector with central angle $150^{\circ}$ ? Also, calculate the ratio of the areas of the three sectors.