User:Remi/Scratchpad

estimate

sig figs not counted.. years off 2003/2004

not double checked

From the PDF:
 * Nutrition Facts
 * Serving size ½ cup (82g)
 * Corn, heated and drained
 * Amount Per Serving
 * Calories 80

From Wikipedia:
 * "Worldwide production was over 600 million metric tons in 2003 — just slightly more than rice or wheat. In 2004, close to 33 million hectares of maize were planted worldwide, with a production value of more than $23 billion."


 * 600,000,000 metric tons of corn produced in 2003 = 600,000,000,000 kg
 * 33,000,000  hectares of maize planted in 2003 = 81,543,000 acres = 127,410.938 mi^2 (New Mexico = 121,665 sq mi)

975.61 cal/kg in maize ....

suppose 6.5 billion ppl

need 2400 cal each...

2,400 x 6,500,000,000 = (1.56 × 10^13 ) x 365

15,600,000,000,000 calorise/day

15.6 trillion calories/day to feed the whole world

5.69400 × 10^15 calories a year to feed the whole world...

5,694,000,000,000,000 calories of food to feed the whole world for a year...

975.61 cal/kg in maize ....

5,694,000,000,000,000 calories / 975.61 cal/kg(maize)

5.83634854 × 10^12

5,836,348,540,000 kg of maize to feed the whole world for a year, hypothetically

5,836,348,540 metric tonnes... or 5.836 billion metric tonnes to feed the whole world for a year.. compared to the 600,000,000 already in production.... (as of ~2003)

600,000,000 / 5,836,348,540 = 0.102804004

127,410.938 mi^2 of maize planted in 2003....

127,410.938 / 0.102804004 = 1,239,357.74

so roughly and hypothetically... if you plant about 1.24 million square miles of corn you could feed the whole world for a year...

or approximately an area a little smaller than India.

... 1,239,357.74 mi^2 / 100 = 12,393.5774 mi^2...

~ Massachusetts or hawaii...

1 acres = 0.0015625 square miles

18.18 metric tonnes/hecrtre - strike that maybe...

"metric ton, also referred to as a metric tonne or tonne métrique, is a measurement of mass equal to 1,000 kilograms"


 * "2.471 acre 	= 1 ha = 	104 m²"
 * "107,639 sq ft 	= 1 ha = 	104 m²"


 * 82  x       80
 * 1000 x           1

kilograms = 2.205 = pounds

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