A stone is dropped from a building and \[2\] seconds later another stone is dropped. How far apart are these two stones by the time the first one reaches a speed of\[30\,\,m\,\,{{s}^{-1}}\](Take\[g=10\,\,m\,\,{{s}^{-2}}\])

A stone is dropped from a building and \[2\] seconds later another sto

1.	A stone is dropped from a building and \[2\] seconds later another stone is dropped. How far apart are these two stones by the time the first one reaches a speed of\[30\,\,m\,\,{{s}^{-1}}\](Take\[g=10\,\,m\,\,{{s}^{-2}}\])
A.	\[80\,\,m\]
B.	\[100\,\,m\]
C.	\[60\,\,m\]
D.	\[40\,\,m\]
Answer» E.

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A stone is dropped from a building and \[2\] seconds later another stone is dropped. How far apart are these two stones by the time the first one reaches a speed of\[30\,\,m\,\,{{s}^{-1}}\](Take\[g=10\,\,m\,\,{{s}^{-2}}\])

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