Question

1. A track runs at a speed of 36 km/h. How far does it go in 12 seconds?​

Answer 1

Answer:

0.4

Step-by-step explanation:

1min = 60sec

360 sec ----12

12 ----- 12*12 by 360

ans= 0.4

Answer 2

Solution :-

• Speed = 36km/h
• Distance covered in 12 seconds = ?

The speed is given in km/h and the time is given in seconds . So either km/h should be converted into m/s or seconds should be converted into hours . Let's convert km/h → m/s

=⟩ 36 km/h = x m/s

=⟩ 36 × 1000m/3600s = x m/s

=⟩ 36 × 10/36 m/s = x m/s

=⟩ 10m/s = x m/s

=⟩ x = 10m/s

[ Here ‘x’ means the converted speed from km/h to m/s ]

♦ So now , the track runs at a speed of 10m per second , we need to find the distance covered in 12s .

⇒ 1 second = 10m

And for 12 seconds

⇒ 12 seconds = 12 × 10

⇒ 12 seconds = 120m = 0.12 km

Hence , the track runs 0.12km in 12s at a speed of 30km/h