Kakak mencuci motor 3/4 jam sedangkan paman mencuci motor 1/2 jam berapa menit waktu yang di perlukan jika kakak dan paman mencuci motor bersama

The question roughly translates to:

If the sister wash motors 3/4 hour while her uncle wash motors for 1/2 hour how many minutes of time did the sister and uncle wash motors in total

Jawabannya akan menjadi 45 menit

The answer would be 45 minutes