The calculated distance (air line) between Kot Mumin and Chak Jhumra is approximately 44 miles respectively 70 kilometers.
By car or train, the actual journey to Chak Jhumra is certainly longer, as only the direct route (as the crow flies) between Kot Mumin and Chak Jhumra has been calculated here.
Air line (approximately)
70 kilometers
38 nautical miles