0.02 mole of KHCO3 will react with how many equivalents of Ca(OH)2:

For a complete reaction, the number of equivalents of all the reactants involved should be the same. Since the valency factor of Na' in NaHCO3 is 1, so its 0.02 mole= its 0.02 equivalent. So, number of equivalents of Ca(OH)2 must be 0.02.