Directions [Set of 4 questions]: Refer to the data below and answer the questions that follow.
Quantity of Iron = (Quantity of zinc/Quantity of copper) $\times ~20$
The above line graph shows the quantity of zinc and copper in the five alloys which are made up of multiple elements. The quantity of iron in each alloy can be calculated using the given formula. (Assume that the quantity of each alloy is 300 kg)
What is the ratio of quantity of iron for alloy 1 to alloy 3?
Solution
Quantity of iron in alloy 1 = 100 kg.
Quantity of iron in alloy 3 = 160 kg.
Therefore ratio = 5:8