An arc of length 22cm subtends an angle of θ at the...
An arc of length 22cm subtends an angle of θ at the center of the circle. What is the value of θ if the radius of the circle is 15cm?[Take π = 22/7]
70o
84o
96o
156o
168o
Correct answer is B
2πr=2×3.142×15=94.28cm
94.28cm = 360°
1cm = \frac{360°}{94.28}
\therefore 22cm = \frac{360°}{94.28} \times 22
= 84°
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