Impossible Math Problem?

Science & Mathematics by Anonymous 2018-05-11 13:09:56

Social Science

Impossible Math Problem?

No response

Twin​ brothers, Billy and​ Bobby, can mow their​ grandparent's lawn together in 91 minutes. Billy could mow the lawn by himself in 45 minutes less time that it would take Bobby. How long would it take Bobby to mow the lawn by​ himself? I'm losing my mind.