book Maths Puzzle Numerical Ability

A truck travels at 35 km/hr for 30 min. It then travels at 90 km/hr for 45 min. Calculate the total distance that the truck has traveled.

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The number of barber jobs in 1998 is 54,000. In 2008 it is 50,000. The change is -4. What is th percent of the decrease? Do the inequalities X < 4 and X^2 < 4^2 both have the same solution set? Please explain. Thanks.