book Maths Puzzle Numerical Ability

A child in an airport is able to cover 388 meters in 4 minutes running at a steady speed down a moving sidewalk in the direction of the sidewalk's motion. Running at the same speed

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book Other Question
Solve the inequality. State the solution set using interval notation and graph it.


x - 3/x + 5 < 0


I just can't seem to understand fractions in an equation. Thanks in adv Two sums of money were invested at 13% and 15% respectively. The amount invested at 15% was twice the amount invested at 13%. The total annual income from the two investments was