Question

The cost of a truck is 400% greater than the cost of a car. If there is an increase in the cost of the car by 20% and that of truck by 15%. Then the total increase in the cost of 5 trucks and 10 cars is

Answer 1

Let the bike's initial cost be x and then car's initial cost be 5x

After the increase,

Bike price = 1.2x

Car price = 5.75x

Initial total cost of 5 cars and 10 bikes,

= 25x + 10x = 35x

New cost,

= 28.75x + 12x = 40.75x

Change in cost = (40.75x - 35x) = 5.75x

% change = (5.75x100)÷35

=115/7 percent