Reshma travels 45 km at 15 km/h by cycle,80 km at 40

Solution

Total Distance = 45 km +80 km +6 km =131km The time taken for each mode of transport is calculated using the formula: Time = Distance Speed   Time taken by cycle = 45 km /15 km/h = 3 hours   Time taken by car = 6 km /2 km/h= 3 hours   Time taken by foot= 80 km /40 km/h = 2 hours The total time taken is the sum of the time taken for each segment: Total Time = 3 hours + 2 hours + 3 hours =8 hours Average Speed = Total Distance /Total Time Average Speed = 131 km/ 8 hours = 16.38 km/h