Originally Posted by

**M23** **I posted this before, but got an incorrect answer. I really do not know how to go about doing this calculation. If someone can just explain to me how I should do it, it would be very much appreciated. **

Assume that one square kilometer of field produces 300 tonnes/kmē (1 ton =1000kg) of grain every year.

The grain grown in that field contains 141900kJ of energy. Assume that an average person needs 2400kJ every day of energy to survive.

I am not sure how I would go about calculating when it says:

Calculate the number of people a 1kmē field could support for one year if people ate only grain. The options are as follows:

a) 125

b) 4.86 x 10^4

c) 1.77 x 10^7

Thanks for the help! I really appreciate it