Need help on this one please.... Thanks very much.
Sandra can take two alternative routes from Melbourne to Brisbane. If she takes route A she passes through 8 toll booths and takes 19 hours and 10 minutes to get there, and the trip costs her $155.00. If she takes route B she passes through 2 toll booths and takes 21 hours and 40 minutes to get there, costing her $140.00. All toll booths charge the same price. How much does petrol cost Sandra per hour, and what price do the tollbooths cost?