exam Maths Puzzle Numerical Ability

A driver gear with 75 teeth running at 32 rpm (revolutions per minute) will transfer what rpm to a driven gear with 24 teeth?

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A rectangle has an area of 192 and a perimeter of 56. Find the dimensions for length and width. (A = Lw & P = 2L + 2W)
19+(x/2)=4

if you can i nedd help help in

-1/5d-1=12