Người đó đến B lúc:
7 giờ 15 phút + 2 giờ 45 phút + 20 phút=10 giờ 20 phút
10 gio 20 phut 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000/
10 giờ 20 phút
chắc chắn 100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%