Question

Frank can mow his yard in 45 minutes, but Joe can mow his yard, which is 40% larger than Frank's, in an hour. How long would it take them, working together, to mow both lawns? Express your answer as mm:ss, where mm is the number of minutes and ss is the number of seconds, rounded to the nearest whole number, it would take them.

Answer 1

I hour 45 mins so it is I1 hour plus 45min I think

Answer 2

1 hour and 45 minutes