задача

до остановки автобуса  папа идет 10мин а на автобусе едет на работу на 20 мин больше чем идет до остановки.Сколько всего времени он тратит на дорогу

Hello my friend from Africa! My name is Vova . What is your name? I`m six. And you? How are you ? I`ve got a dog . He is very big . His name is Rex. He is brown and black . I like to play with Rex . Rex doesn`t like to jump. He likes to run or to sit under the table. Rex likes to play with me, too. I love my dog. II want to have a cat, too. Have you got a dog? If you have, what is its name? What colour is it? Is it big or little? Do you like play whit it? I want to know about you and about Africa, about elephants, monkeys and crocodiles in Africa.

биссектрисы углов А и В при боковой стороне АВ трапеции ABCD пересекаются в точке F. Найдите АВ, если AF=24, BF=10.