Answer
The bill amount given by customer to taxi driver is unnecessary in this problem.
Work Step by Step
Cost charged for first mile = 3 dollars
Cost charged for extra miles = (0.5 x 2 )dollars = 1 dollar
Distance traveled = 6 miles (that is 5 miles extra)
Cost charged by the taxi driver = (1 x 3) + (5 x 1) = 3 + 5 = 8 dollars
Therefore, cost of trip is 8 dollars.
The bill amount given by customer to taxi driver is unnecessary in this problem.
