Slender and scrawny. "Slender" connotes grace and desirability, while "scrawny" connotes weakness and unhealthiness. ("Thin" is sort of in the middle as it could be either just "having little flesh" to "having too little flesh".)
acceleration a = v - u / t = 25 - 13 / 6 = 2 m/s^2
so that distance travelled S = v^2 - u^2 / 2 a = 25 x25 - 13 x13 / 2 x 2 = 114 m.
