Question

please send me the answer step by step​

Answer 1

Answer:

Let us assume the total distance travel be 3x .

So, the car travels X distance with each speed.

As we know,

S = d/t

➡ t = d/s

So the total time taken would be,,,

T = x/40 + x/50 + x/30

Total distance , D = 3x

Average speed = D/T

= 3(x/40 + x/50 + x/30)

Cancel x from numerator and denominator...

The answer is 6 hours 20 min