Question

comvert in to km/h 20m/sce​

Answer 1

Answer:

72 km / h

Step-by-step explanation:

Use unit analysis:

1 km = 1000 m  =>  ( 1 / 1000 ) ( km / m ) = 1

1 h = 60 min = 60×60 sec = 3600 sec  =>  3600 sec / h = 1

20 m / sec

= 20 ( m / sec ) × 1 × 1

= 20 ( m / sec ) × ( 1 / 1000 ) ( km / m ) × 3600 ( sec / h )

= ( 20 × 3600 / 1000 ) km / h              [ the "m" and "sec" cancel ]

= 72 km / h