Answer:
[tex] \huge{ \boxed{ \tt{250 \: \sf{m \: / \: s} }}}[/tex]
Explanation:
[tex] \star{ \sf{ \: \underline{ Given}}} : [/tex]
[tex] \sf{Distance \: travelled \: = 1000 \: m}[/tex]
[tex] \sf{Time \: taken \: = \: 4.0 \: s}[/tex]
[tex] \underline{ \sf{Let's \: find \: it's \: speed}} : [/tex]
[tex] \boxed{ \sf{Speed = \frac{Distance \: travelled}{Time \: taken} }}[/tex]
[tex] \mapsto{ \sf{Speed = \frac{1000 \: m}{4.0 \: s}}} [/tex]
[tex] \mapsto{ \sf{speed = 250 \: m \:/ \: s}} [/tex]
Hope I helped!
Best regards! :D
~[tex] \sf{TheAnimeGirl}[/tex]