Distance \\\\(= 57336.0km - 57321km = 15km\\\\)Speed in km\\\\(/\\\\)min \\\\(=15km/20min = \\dfrac{3}{4} km/min\\\\)Speed in \\\\(km/hr= \\dfrac{3}{4} \ imes \\dfrac{km}{min} \ imes \\dfrac{60 min }{hr} =(15\ imes 3)km/hr =45km/hr\\\\).