1. When Steve went out into the garden, he was surprised to find the men had finished the job. "That was quick work," he said. "54 minutes for the lot." "Well, we just kept going and it was the same for all three of us," old Dan replied. "Bob is two-thirds as fast as Bert, and young Bert's half as fast as I am. But I've had more experience." How long would Dan have taken to do the whole job alone?

Dan would have taken 112 minutes alone

Dan would have taken 99 minutes alone

Dan would have taken 86 minutes alone