exam Maths Puzzle Numerical Ability

Help: A roof rises 9.75ft over ahorizontal distance of 17.24ft. What is the slope of the roof to the neares hundredth?

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n + 5 3/10= 8 1/10 A forester mixes gasoline and oil to make 2 gallons of mixture for his two-cycle chain-saw engine. The mixture is 32 parts gasoline and 1 part two-cycle oil. How much gasoline must