Answer:
Speed = 16 km per hour
Speed = [tex]4\frac{4}{9}[/tex] meter per second
Step-by-step explanation:
b). Total distance covered to and fro = 12 + 12
= 24 km
Total time taken to cover this distance = 1.5 hours
Since, speed = [tex]\frac{\text{Distance traveled}}{\text{Time taken}}[/tex]
= [tex]\frac{24}{1.5}[/tex]
= 16 km per hour
Since, 1 km = 1000 m
And 1 hour = 3600 seconds
16 [tex]\frac{\text{km}}{\text{hour}}[/tex] = 16 × [tex]\frac{1000}{3600}[/tex] meter per second
= [tex]\frac{160}{36}[/tex]
= [tex]\frac{40}{9}[/tex]
= [tex]4\frac{4}{9}[/tex] meter per second
