Question

Wheat contains about 2.5 kcal per gram, and the average U.S. male consumes 2500 kcal per day. How many hectares of wheat are needed to support one average U.S. male for a year, assuming that 30 percent of his caloric intake is from wheat?

Answer 1

First of 30% of 2500kcal is 750kcal
if a male consumes 2.5 kcal then 750kcal / 2.5kcal = 300
but then we would need to know how many wheat are on one hectare of land.

Answer 2

Answer:109.5 Kg

Explanation:

Given

Given 30 % of intake is from wheat

Therefore an US male consumes 0.3(2500)=750 kcal per day

and For 1 year it is
`750* 365 =273750` kcal per year

and wheat contains 2.5 kcal per gram

therefore =
`(273750)/(2.5)`=109.5 kg of wheat is required For an US male.