 
<translate> Idan ya bar gidansa da ƙarfe 7:50 na safe kuma ya yi tafiyar minti 30 kafin ya kai wurin da za a karɓe shi, ya isa wurin da za a karɓe shi da ƙarfe 7:50 + minti 30 = 8:20 na safe. Idan bas din ya tashi a karfe 8:00 na safe a kowace rana, to Delaney ya kasance 8:20 na safe - 8:00 na safe = mintuna 20 da suka wuce lokacin da bas din ya riga ya tafi. Saboda haka, amsar ita ce 20. <eng> If he left his home at 7:50 a.m. and the distance to the pick - up point is 30 minutes away, he arrived at the pick - up point at 7:50 + 30 minutes = 8:20 a.m. If the bus leaves at 8:00 a.m. every day, then Delaney was 8:20 a.m. - 8:00 a.m. = 20 minutes late when the bus had already left.
Thus, the answer is 20. 