Answer Posted / vivek kumar bit mesra

for mon-fri, time for wich he walks is
= 5*8-(5*0.45)=36hr 15min
On sat since he walks only till noon so time for lunch need not de deducted , so time for wich he walks on sat will be simply 3hr

Total time is therefore 36hr 15min + 3hr = 39hr 15min

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