A triangle has side lengths in the ratio 3 : 4 : 5. If the perimeter of the triangle is 84 cm, what is the length of the shortest side?
Jam is made from 4 parts fruit to 3 parts sugar. How much sugar is needed to make jam from 1kg of fruit?
3, 4 and 5 imply that 12 equal parts comprise the 84cm
So, 3 i of those 12 parts =
3/12 x 84 =
1/4 x 84 =
21 cm
For the second question, the fruit part is 3/4 of the jam part....so...if 1 kg of fruit is used, then 3/4 kg of sugar is used.