2 stones are dropped from the top of a tower at half a second apart .The time after dropping the first stone at which the distance between the 2 stones is 20 m is
a. 4 s
b. 4.25 s
i took 1 distance as x and other as 20 + x ...
how to take time ..can some1 pls help me...

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tnx a lot.. :) u're gr8 !!

can u pls help once more?? i dint understand 18.75/5..y did u do that?

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