kill(all)$

van=facebook.com/LearningCalculus$

      A problem submitted by حمودة أبوالدهب

      There are infinite solutions to:

integrate(f(x)*sin(%pi*x),x,0,1/4)=0.0725;

725/10000;

      One solution assumes that f(x) is a constant:

f*integrate(sin(%pi*x),x,0,1/4)=29/400;

solve(%,f);

float(%);