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In the circle above, with centre O and radius 7 cm. Find the length of the...

Mathematics
JAMB 2019

In the circle above, with centre O and radius 7 cm. Find the length of the arc AB, when < AOB = 57°.

  • A. 5.32 cm
  • B. 4.39 cm
  • C. 7.33 cm
  • D. 6.97 cm
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Correct Answer: Option D
Explanation

Length of arc = \(\frac{\theta}{360°} \times 2 \pi r\)

= \(\frac{57}{360} \times 2 \times \frac{22}{7} \times 7\)

= 6.97 cm

There is an explanation video available below.


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Explanation Video

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free