The calculated distance (air line) between Mikashevichy and Svyetlahorsk is approximately 100 miles respectively 160 kilometers.
By car or train, the actual journey to Svyetlahorsk is certainly longer, as only the direct route (as the crow flies) between Mikashevichy and Svyetlahorsk has been calculated here.
Air line (approximately)
160 kilometers
86 nautical miles