15x A railway train is travelling on a curve of 1500 m radius at the r

1.	15x A railway train is travelling on a curve of 1500 m radius at the rate of 66 km/hrThrough what angle will it turn- in 20 seconds
Answer» speed in m/s = 665/18 = 55/3 m/s Arc length is v×t = 5520/3 = 1100/3 m so, arc length is = 2πR∅/360° and ∅ = Arc length 180°/πR = [(1100/3)/(π*1500)]×180° = 14.01°

15x A railway train is travelling on a curve of 1500 m radius at the rate of 66 km/hrThrough what angle will it turn- in 20 seconds

Answer»

speed in m/s = 66*5/18 = 55/3 m/s

Arc length is v×t = 55*20/3 = 1100/3 m

so, arc length is = 2πR∅/360°

and ∅ = Arc length *180°/π*R = [(1100/3)/(π*1500)]×180° = 14.01°