Question

a dog runs 54km in just 3days ,it runs 2km more each day . how many kilometers does it run for the first 2 days?

Answer 1

Let x be the distance it runs on the first day, then:-

x + x + 2 + x + 4 = 54

3x + 6 = 54

3x = 54 - 6 = 48

x = 48/3 = 16 km

So for the first 2 days it runs 16 + 18 = 34 km. Answer

Answer 2

Answer

34 Km

Explanation

Assuming that the dog ran x Km the first day, 

1st day = x km

2nd day = (x+2)

3rd day = (x+2)+2 = (x+4) Km

So we have,

x + (x+2) + (x+4) = 54

3x + 6 =54

3x = 54-6

3x = 48

x = 16 Km.

∴  

1st day = 16 Km

2nd day = 16 + 2 = 18

Total distance for the first 2 days = 16 + 18 = 34 Km