1.

The length of the arc subtended by an angle of 7π/4 radians on a circle of radius 20 cm is(A) \(\frac{80\pi}7\) cm(B) 35π cm(C) 20π cm(D) 7π cm

Answer»

(B) 35π cm

S = r\(\theta\) = 20 x 7π/4 = 35π cm



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