exam
Maths Puzzle
Numerical Ability
An airplane took 2 hours to fly 600km against a head wind. The return trip with the wind took 1 2/3 hours. Find the speed of the plane in still air.
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exam Other Question
Two cars start off 236 miles apart and drive towards each other on the same road. One is driving 8 mph slower than the other. they meet after 2 hours. What is the speed of each car?
The cost of producing a number of items x is given by C = mx + b, in which b, in which b is the fixed cost and m is the variable cost (the cost of producing one more item).
(a)