exam Maths Puzzle Numerical Ability

1. At noon a private plane left austin for los angeles,2100km away, flying at 500km/hr. one for austin at 700km/hr. at what time did they pass each other?

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exam Other Question

For the following function, C computes the cost in millions of dollars of implementing a city recycling project when x percent of the citizens participate.

C(x)= 1.4x/100-x hi could you help me solve this rational equation?

(2x-4)/(x-5)=0

Thanks a lot