Answer:
372 ft
Step-by-step explanation:
This can be solved through cross multiplication.
310ft/10sec= x/12sec
Multiply the values across from each other. (A good way to know you've done it properly is if the numbers you multiplied are in different measurements. ex: 1 value is feet, the other is seconds)
310 x 12 = 3720
Divide by the remaining value.
3720 / 10 = 372