Cell X has a surface area of 60\, \mu\text{m}^260μm 2 60, mu, start text, m, end text, squared and a volume of 15\, \mu\text{m}^315μm 3 15, mu, start text, m, end text, cubed. Cell Y has a surface area of 36\, \mu\text{m}^236μm 2 36, mu, start text, m, end text, squared and a volume of 12\, \mu\text{m}^312μm 3 12, mu, start text, m, end text, cubed.

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.