Copper is 0.2 alloy, zinc is 0.46 alloy, the rest is other metals. What is the weight of the alloy if the weight

Copper is 0.2 alloy, zinc is 0.46 alloy, the rest is other metals. What is the weight of the alloy if the weight of other metals is 153 g? Wheat was sown on 4/5 of the entire area in the peasant farm. 1158 wheat was harvested in autumn. from 1 hectare amounted to 19.3 centners of wheat. How many hectares is the entire area of the peasant farm?

1) Let’s calculate what percentage of the alloy are other metals:

1 – 0.2 – 0.46 = 0.34 = 34%;

One percent alloy weight:

153: 34 = 4.5 grams;

The whole alloy makes up the mass:

4.5 * 100 = 450 grams;

2) Let’s find how many hectares are allocated for wheat:

1158: 19.3 = 60 ha;

The total area of the farm will be:

60: 4/5 = 60 * 5/4 = 75 hectares.