Question

Numericals: Q.1 A car takes 20 minutes to cover a distance of 15 km. calculate it's speed in km/hr and m/s.​

Answer 1

Answer:

45km/h or 12.5m/s

Explanation:

Given: Distance travelled=15km, time taken=20min = 1/3hr

Speed= Distance travelled/ Time taken

= 15/(1/3) =15×3 =45 km/h

1 km/h = 5/18 m/s

Therefore, 45 km/h = (45×5)/18 = 12.5 m/s

Answer 2

Answer:

15 km = 15000m.

20 min= 20*60 = 1200 sec

= 20/60 = 1/3 hr

Speed= distance/ time

= 15000/1200

= 50/4= 12.5m/sec.

Speed = distance /time

= 15/1/3

= 15*3

= 45km/hr.