If you can run 100 meters in 20 seconds, what is your speed?

-18.00 km/h (kilometer per hour)
-300 m/min  (meter per minute)
-5.00 m/s     (meters per second)

* You didn't put what specific unit you wanted it in so I just
put it in those three 

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.