book Maths Puzzle Numerical Ability

Triangle ABC has area 240. Points X,Y,Z lie on sides AB,BC, and CA, respectively. Given that segment AX/BX=3, BY/CY=4, CZ/AZ=5, find the area of triangle XYZ.

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book Other Question

How do you figure a percentage profit on cost?
If you have a item with the cost of $150.00 and want to make 35% profit on it what formula do you use? Is that called gross profit on cost?
Thanks,
Ron. the product of the page number on two facing pages of a book is 600. find the page numbers