# Variation

The distance D covered by a falling ball varies as the square of the time take T, calculate the distance when the time taken is 13 seconds and the time taken for a distance of 648m.

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1. D = kT^2
when T=13, D = 169k
when D=648, T = √(648/k)

Supply the missing info, and you can get numbers.

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2. as in i need d solution

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