exam Maths Puzzle Numerical Ability

I have a couple questions that are word problems.

Carlos and Maria drove a total of 258 miles in 5 hours. Carlos drove the first part of the trip and averaged 53 miles per hour

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exam Other Question

the Pro Shop sold 6 of 20 tennis rackets in May. What percent of the tennis rackets were sold? Line segment MS and line segment NR are medians of triangle MNK. If MS = 15, NR = 18, and MN = 21. what is the perimeter of triangle PRS?