exam Maths Puzzle Numerical Ability

Mercy can prepare a manuscript in 6 hours. Eunice can prepare it in 4 hours. How Long would it take them to preapre the manuscript together?

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exam Other Question
2x + 3y = 1
5x + 3y = 16
x = ?
y = ? Find the smallest angle in the triangle whose sides have length 35.6cm, 58.43cm,and 52.23.