Respuesta :
answer is 80/13 = 6.15 hrs
(1/16)x + (1/10)x = 1
(5/80)x + (8/80)x = 1
(13/80)x = 1
x = 80/13 = 6.15 hrs
(1/16)x + (1/10)x = 1
(5/80)x + (8/80)x = 1
(13/80)x = 1
x = 80/13 = 6.15 hrs