exam Maths Puzzle Numerical Ability

how do u find the perimeter of a triangle with the angles of 12cm ,18cm, 19cm and a height of 12cm

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exam Other Question

If k, n, x, and y are positive numbers satisfying x^-4/3 = k^-2 and y^4/3 = n^2, what is (xy)^-2/3 in terms of n and k? the number(G) of gears a machine can make varies directly as the time(t) it operates. If it can make 2200 gears in 5 hours how many gears can it make in 8 hours?