Question

mark walks between home and school four time each day. he works out that he walk 2.8 km daily. how far is it from mark's home to his school in metres?

Answer 1

He walks four times. The distance covered if he walks four times is 2.8 km. 
1 km = 1000 m. So, 2.8 km = 2.8 x 1000 = 2800 m.
The distance he covered if he walks one time = 2800/4 = 700 m.

So, the distance between mark's home & his school is 700m



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Answer 2

Dist. B/w home to school is 350 mtrs.
1 round from home to school=2800m/4=700m
700/2=350 is the answer