Question

6. A car covers 1st 2 km of total distance of
4km with a speed of 30km per hour and
remaining distance of 2km with a speed of
20km per hour. The average speed is *​

Answer 1

Answer:

Explanation:

Solution :-

Here,

We know that,

Time taken = Distance/Speed

So,

According to the Question,

1st Case,

t₁ = 2/30

t₁ = 1/15

And,

2nd case,

t₂ = 2/20

t₂ = 1/10

Now,

Total time taken, t = 1/15 + 1/10

= 2 + 3/30

= 5/30

= 1/6

And,

Total distance = 4 km

Average Speed = Total Distance/Total time taken

= 4/(1/6)

= 4 × 6/1

= 24 km/h

Hence, the average speed is 24 km/h.