Answer:
The charge for shovelling snow for 6 hour is 72 hours
Explanation:
Given as :
The charge for shovelling snow for 2 
 hours is $30
 hours is $30
Let The charge for shovelling snow for 6 hours = $ x
Now, Applying unitary method
∵ The charge for shovelling snow for 2 
 hours = $30
 hours = $30
or, The charge for shovelling snow for 
 hour = $30
 hour = $30
So, The charge for shovelling snow for 1 hour = 
 hour
 hour
∴ The charge for shovelling snow for 6 hour = 
 × 6 hours
 × 6 hours 
I.e The charge for shovelling snow for 6 hour = 
 hours
 hours
 = 72 hours
Hence The charge for shovelling snow for 6 hour is 72 hours Answer