book Maths Puzzle Numerical Ability

if T =3ph +5 Find T when p =4 and h = 2

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book Other Question

what is the geometric mean of 5 and 15? I have a right triangle I have to find the area for

On the figure they have points a b c
A to C 6ft C to B is 9ft and I must need A-B
the right triangle does show a 90 degree at point C