When a pendulum of length 50 cm oscillates, it produces an arc of 16 cm. The angle so formed in degree measure is (approx)
360 degree =$$2\pi r$$
(Where r = length of pendulum =50 cm.)
So angle created by 16 cm. arc will be =$$\frac{360\times 16}{2\pi 50}$$
= 38.30 degree or 38 degree 20 minute
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