1.

1). 4 km2). 8 km3). 5 km4). 6 km

Answer»

Let the DISTANCE covered in TWO more DAYS be x KM

⇒ (3 + 4 + 3.5 + 5 + 4.5 + x)/7 = 4

⇒ 20 + x = 28

⇒ x = 28 - 20 = 8

∴ Distance covered in two more days = 8 km



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