Same trip ($0\to 1$ h: $+40$ km, $1\to 2$ h: $+0$ km, $2\to 3$ h: $+60$ km). The total distance covered in…

Same trip ($0\to 1$ h: $+40$ km, $1\to 2$ h: $+0$ km, $2\to 3$ h: $+60$ km). The total distance covered in $3$ hours is:
  1. $80$ km
  2. $100$ km
  3. $120$ km
  4. $140$ km

Solution

Total $= 40 + 0 + 60 = 100$ km.

Asked in: IMO

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