Answer :
The lawn accumulates a new layer of snowflakes every minutes.
Lawn size = 500 sq ft
Minutes in an hour = 60 minutes
Layers accumulated = 60
Let there be 1000 snowflakes in a layer
Snowflakes = 500 x 60 x 1000
= 3 x 10⁹ snowflakes
Mass = 3 x 10⁷ x 2 x 10⁻⁶ kg
Mass = 60 kg of snow
Lawn size = 500 sq ft
Minutes in an hour = 60 minutes
Layers accumulated = 60
Let there be 1000 snowflakes in a layer
Snowflakes = 500 x 60 x 1000
= 3 x 10⁹ snowflakes
Mass = 3 x 10⁷ x 2 x 10⁻⁶ kg
Mass = 60 kg of snow