clc
// Given That
r = 7e8 // radius sun in meter
power_sun = 3.8e26// power radiated by sun in W
//Sample Problem 13 Page No. 86
printf("\n # Problem 13 # \n ")
s = power_sun /(4 * %pi * (r^2)) //calculation of Pressure applied by sun radiations on earth
 printf("Pressure applied by sun radiations on earth is %e W/m^2 \n", s)