When the minute hand of a clock covers a distance of 1 hr 30 min, then the angular distance covered by it is:

540°

Angular distance covered by minute hand in 1 hour i.e. 60 minute = 360º

Angular distance covered by minute hand in 1 minute = \(\frac{360º}{60}\)

= 6º

We know, 1 hour 30 minutes = 90 minutes

Angular distance covered by minute hand in 1 hour 30 minute i.e. 90 minute

= 90 × 6º

= 540º