The calculated distance (air line) between Robertsonpet and Mārāndahalli is approximately 43 miles respectively 70 kilometers.
By car or train, the actual journey to Mārāndahalli is certainly longer, as only the direct route (as the crow flies) between Robertsonpet and Mārāndahalli has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles