Neco 2020 Geography Question 48

Two alternative routes connect City A to City B. Route X is 120 km long and consists of a 40 km highway segment (speed limit 100 km h\(^{-1}\)) followed by an 80 km town segment (speed limit 50 km h\(^{-1}\)). Route Y is 150 km long. It is a highway with a speed limit of 80 km h\(^{-1}\) except for a 20 km construction zone where the limit is reduced to 40 km h\(^{-1}\). Assuming the driver travels exactly at the speed limit on each segment, determine: (a) the total travel time for each route (in hours and minutes); (b) which route is faster; (c) the total fuel consumption for each route if the vehicle uses 8 L / 100 km on highway segments (speed ≥ 80 km h\(^{-1}\)) and 10 L / 100 km on lower‑speed segments; (d) the fuel cost for each route if petrol costs ₦200 per litre.