book Maths Puzzle Numerical Ability

The height of a triangle is 8 inches less than its base. the area of the triangle is 192 sq inches. The height of the triangle is __ inches and the base of the triangle is __ inche

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urgent....need help?

the difference of two numbers is 11, and their product is 42. Find these numbers.

choices:
a. -14 and 3
b. -3 and 14
c. pair -14 and 3, -3 and 14
d. pair -14 and 3, 3 and 14

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Is there a formula to find the height(h) of a section of a chord ,knowing the full chord length (c), the sections length (l) and the radius of the arc(r)?

Say (c)=914.4mm, (l)=