If your front lawn is 21.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snowflakes every minute, how much snow, in kilograms, accumulates on your lawn per hour? Assume an average snowflake has a mass of 1.90 mg.

snow is 64.638 kg / hr

Explanation:

Given data

wide w = 21 feet

long L = 20 ft

area A = 1350 square foot

mass of snow m = 1.90 mg

to find out

snow in kilograms / hour

solution

we will find snow in kg

so we apply formula that is

snow kg / hour = w * L * A * m * 60/10^6

put all value we get snow

snow = 21 * 20 * 1350 * 1.90 * 60/10^6

snow = 420 * 1350 * 1.90 * 60/10^6

snow = 1077300 * 60/10^6

snow = 64.638

hence snow is 64.638 kg / hr