For this question we will use the following relations.
100 centimeters=1 meter (or 1 centimeter= 0.01 meter)
10 millimeter=1 centimeter (or 1 mm=0.1 cm)
60 minutes = 1 hour (or 1 min=[tex]\frac{1}{60}[/tex] hour)
Now, Jackson's speed is 1350 meters per hour. This can be converted to cm per minute as follows:
[tex]\frac{1350 m}{1 h}=\frac{1350\times 100 cm}{60 min}=2250 cm/min[/tex]...Equation 1
Likewise, Jonah's swim speed in cm/min can be calculated as:
[tex]\frac{1250 mm}{1 s}=\frac{1250\times 0.1 cm}{\frac{1}{60}min } =\frac{125\times 60 cm}{1 min}=7500cm/min[/tex]...Equation 2
As we can see clearly after comparing Equation 1 and Equation 2, Jonah's swim speed of 7500 cm/min is faster than that of Jackson.
Thus, option B is correct.
