Tortoises are cold-blooded - just like other reptiles. They have a relatively poor diet - consisting of (mainly) green leafy vegetable matter in the wild. The poor nutrition, coupled with the fact the need to bask in sunlight to give them enough body heat to allow them to move, makes them sluggish. However - once warmed enough - they can actually move at a fairly rapid pace !
moves very slowly with its 4 legs
slug
Oh, dude, the underlined adverb "slowly" tells you to what extent the tortoise moved. It's like saying, "Hey, this tortoise wasn't speed racing down the path, it was taking its sweet time." So, yeah, "slowly" is all about that leisurely pace, man.
A slug moves slowly and so does a snail
A tortoise moves by using its four legs to walk slowly on land. They are not known for their speed, so they typically move at a slow and steady pace. Tortoises also have a protective shell that they can retract into for safety.
Five animals that move slowly include the sloth, which is known for its leisurely pace in the trees; the tortoise, known for its deliberate and unhurried movement; the manatee, a gentle marine mammal that glides through water at a slow speed; the starfish, which moves very slowly on the ocean floor; and the garden snail, which crawls at a leisurely pace using its muscular foot. These animals have adapted to their environments, often prioritizing energy conservation over speed.
slowly
Glaciers move slowly.
It moves slowly and steadily.
The inchworm moves slowly. It begins with the letter i.
Land tortoises travel slowly but can sometimes manage human walking speeds
As you have indicated, the tortoise moves 0.2mph, which is equal to one fifth of a mile in one hour. One mile will be traveled by the tortoise in five hours. Half a day is 12 hours, so 0.2 x 12 = 2.4 miles. A tortoise, traveling at 0.2 mph would travel 2.4 miles in half a day.