exam Maths Puzzle Numerical Ability

ron takes two hours more than paul to mow the lawn . working togather they can mow the lawn in 5 hrs . how long does it take each of them working alone

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exam Other Question

Write an equation in standard form for line described.

The line that passes through (-4,-5) and has the same y-intercept as
x+3y+9=0. IF THE RATIO OF THE LENGTH OF THE ALTITUDE OF TWO OPPOSITE TRIANGLES IS EQUAL TO THEIR SCALE FACTOR DOES IT ALWAYS MEAN THAT THE TWO TRIANGLES ARE CONGRUENT ?
PLEASE ANSWER MY QU