Question

The length of a minute hand of a clock is 3.5cm. Find the angle it turns through if it sweeps an area of 4.8cm². (Take π = ²²/₇) 

Answer 1

θ/360πr² = 4.8cm²
θ/360 × 22/7 × 3.5² = 4.8
269.5θ = 4.8
 2520
θ = 4.8 × 2520
          269.5
θ = 44.88°
θ = 44.9°

Answer 2

0.002cm

Answer 3

72.41

Answer 4

72.41