The diagonal length of a laptop computer screen is advertised at 40cm. the width of the screen is 23cm.
work out the leant of the laptop computer screen.
give your answer to the nearest whole number.

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint