A stone thrown vertically upward satisfies the equation\[s=64t-16{{t}^{2}}\], where s is in meter and t is in second. What is the time required to reach the maximum height?

A stone thrown vertically upward satisfies the equation\[s=64t-16{{t}^

1.	A stone thrown vertically upward satisfies the equation\[s=64t-16{{t}^{2}}\], where s is in meter and t is in second. What is the time required to reach the maximum height?
A.	1s
B.	2s
C.	3s
D.	4s
Answer» C. 3s

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A stone thrown vertically upward satisfies the equation\[s=64t-16{{t}^{2}}\], where s is in meter and t is in second. What is the time required to reach the maximum height?

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