Class 10 Question > A sector of a circle of radius 10.5 cm subten...

A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.

- a)37.25 cm
- b)36 cm
- c)21.25 cm
- d)29.25 cm

Correct answer is option 'D'. Can you explain this answer?

Environment Lover
Feb 27, 2019 |

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A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.a)37.25 cmb)36 cmc)21.25 cmd)29.25 cmCorrect answer is option 'D'. Can you explain this answer?

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Nagita Sindhard
Jan 04, 2019 |

Perimeter of sector=2×radius+length of arc. and length of arc=theta÷360×2

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Moshim Kapoor
Feb 27, 2019 |

Related
A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.a)37.25 cmb)36 cmc)21.25 cmd)29.25 cmCorrect answer is option 'D'. Can you explain this answer?

Perimeter of sector =2r + length of the Arc.

length of arc= angle /360×2πr

=45/360×2×22/7×10.5

=1/8×2×22×1.5

=66/8

=8.25

perimeter of sector=8.25+21

=29.25

length of arc= angle /360×2πr

=45/360×2×22/7×10.5

=1/8×2×22×1.5

=66/8

=8.25

perimeter of sector=8.25+21

=29.25

Pardeep Singh
Jan 04, 2019 |

Perimeter of sector =2r+l

L=length of arc

length of arc=theta/360*2πr

=45/360*2*22/7*105/10

=8.25

area of sector= 2(10.5)+8.25

=29.25cm

L=length of arc

length of arc=theta/360*2πr

=45/360*2*22/7*105/10

=8.25

area of sector= 2(10.5)+8.25

=29.25cm

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A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.a)37.25 cmb)36 cmc)21.25 cmd)29.25 cmCorrect answer is option 'D'. Can you explain this answer? for Class 10 2022 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.a)37.25 cmb)36 cmc)21.25 cmd)29.25 cmCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 10 2022 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A sector of a circle of radius 10.5 cm subtends an angle of 45° at the centre of the circle as in adjoining figure. Find the perimeter of sector.a)37.25 cmb)36 cmc)21.25 cmd)29.25 cmCorrect answer is option 'D'. Can you explain this answer?.

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