The stilts increase a person's height by 1.5 yards. If Bonnie, who is 5 feet and 7 inches tall, walks with the stilts, how tall will she be?

1.5 yds * 3ft/yd = 4 1/2 ft = 4'6"

so,
5'7" + 4'6" = 9'13" = 10'1"