#this programme claculates the time required for the egg to be boiled
from math import pi,log
def egg_fun(M,to,ty):
	den=1.038
	c=3.7
	k=5.4e-3
	tw=100
	t=((M**2*den)/(4*pi/3)**2)**(1.0/3)*(c/(k*pi**2))*log(0.76*(to-tw)/(ty-tw))
	return t
	
t0=[4,25]
m=[47,67]
for t in t0:
	for M in m:
		print 'the time required to boil',M,'g. eggs from',t,'dC is',egg_fun(M,t,70)
raw_input()