Question

Plzz answer question( b) it is urgent​

Answer 1

Speed = 16 km per hour

Speed =
`4(4)/(9)` meter per second

Explanation:

b). Total distance covered to and fro = 12 + 12

= 24 km

Total time taken to cover this distance = 1.5 hours

Since, speed =
`\frac{\text{Distance traveled}}{\text{Time taken}}`

=
`(24)/(1.5)`

= 16 km per hour

Since, 1 km = 1000 m

And 1 hour = 3600 seconds

16
`\frac{\text{km}}{\text{hour}}` = 16 ×
`(1000)/(3600)` meter per second

=
`(160)/(36)`

=
`(40)/(9)`

=
`4(4)/(9)` meter per second