Question

Time is 7 and half an hour and speed is 20 km then what is distance​

Answer 1

Step-by-step explanation:

Given,

A man trads at a speed V

1

=20Km/h of distance x.

and Same distance x with v

2

=30 km/h

Let the time travel from speed

v

1

=

20

x

(speed = dist/time)

where x is the constant distance.

Total distance travelled =2x.

Now,

Avg. speed = Total distance travelled/ Total time taken

⇒

30

x

+

20

x

2x

=

5x

2x×60

=24 kmthr