 <translate> Ken can do 20 sit-ups without stopping. Nathan can do twice as many, and Bob can do half the number of Ken and Nathan's combined sit-ups. How many more sit-ups can Bob do compared to Ken?
The answer is 10 <yor> Ken lè ṣe ìjókòó-òkè 20 láì dáwọ́ dúró. Nathan lè ṣe ìlọ́po méjì èyí tó pọ̀ jù bẹ́ẹ̀ lọ, Bob sì lè ṣe ìdajì iye sit-up tí Ken àti Nathan lè ṣe pa pọ̀. Mélòó ni Bob lè ṣe ju Ken lọ? Ìdáhùn náà ni 10 