Answer:
134 f
Explanation:
The hottest temperature ever reliably measured in a desert was 134 degrees F, in Death Valley of the Mojave Desert in 1913.
 
        
                    
             
        
        
        
Solution :
From the given data, 
For the spherical shell is 
where x is the radius of gyration and the acceleration of a rolling body on an inclined plane = a
Therefore, 

   
   
   = 0.6 x 9.81 x sin ( 29.7)
   



Δt = 1.411 s
 
        
             
        
        
        
This is a bit too broad. Maybe this is something to google up