from math import log, pi 

M = 67 
c = 3.7 
rho = 1.038 
K = 5.4e-3 
Ty = 70 
Tw = 100 
T0 = 20.0 

a = (M**(2/3) * c * rho**(1/3))  /  (K * pi**2 * (4 * pi / 3)**(2/3))
b = log ( 0.76 * (T0-Tw) / (Ty-Tw) )
time = a * b
minutes = int (time / 60)
seconds = int (time % 60)

print(f"Starting from {T0} degrees, it takes {minutes} minutes and {seconds} seconds to reach {Ty} degrees.")