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2020 Phase-2 Units and Measurements Conversion between degree, minute and radian Medium Question 30 of 53 in Units and Measurements

The angle of $1'$ (minute of arc) in radian is nearly equal to

A $1.75\times10^{-2}$ rad

B $2.91\times10^{-4}$ rad

C $4.85\times10^{-4}$ rad

D $4.80\times10^{-6}$ rad

The answer is B.

Solution

$1^\circ=\dfrac{\pi}{180}$ rad $\approx0.01745$ rad. $1'=\dfrac{1^\circ}{60}=\dfrac{0.01745}{60}\approx2.91\times10^{-4}$ rad.

Concept Conversion between degree, minute and radian

Units and Measurements in past papers

53 questions from this chapter have appeared across 25 exam years.