When all the leaves have fallen a girl can rake the entire yard in 4 hours. When a boy does italone,it takes him 9 hours. How long would it take them to rake the yard together? Round to the nearest minute

Answer 1

When all the leaves have​ fallen, a girl can rake the entire yard in 4 hours. When a boy does it​ alone, it takes him 10 hours. How long would it take them to rake the yard​ together? Round to the nearest minute.