Question

A motorbike is traveling on a curve of half a kilometer radius at the rate of 20 km per hour through what angle had it turned in 30 seconds?

Answer 1

The point it turns in 30 second should be 45 degree.

Point turned by the prepare proceeding onward the roundabout bend in 10 seconds = circular segment it made by proceeding onward round bend or span of the round bend ⇒ 183.333/1500 = 0.1222 Hence, the prepared turned by 0.1222 Radian (rakish estimation) in 10 seconds which is equivalent to 7 degrees (around).