If your front lawn is 24.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snow flakes every minute, how much snow (in kilograms

Question

 If your front lawn is 24.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour? Assume an average snow flake has a mass of 2.20 mg.

Answer 1

Using dimensional analysis, or what's also called the unit factor method....

 

(24ft x 20ft) x 1350 flakes/sqft - min x 60 min/hr x 2.20 mg/flake x 1 g/1000 mg x 1 kg/1000 g = 85.5 kg/hour