Whole Numbers (Pri5)/ Whole Numbers Seng Kang Primary School / Homework (2018) $\mathrm{Oliver}\mathrm{dropped}a\mathrm{ball}\mathrm{from}\mathrm{height}\mathrm{and}\mathrm{it}\mathrm{re}\mathrm{bounced}\mathrm{to}\phantom{\rule{0ex}{0ex}}1/3\mathrm{of}\mathrm{the}\mathrm{height}\mathrm{from}\mathrm{the}\mathrm{previous}\mathrm{bounce}.\phantom{\rule{0ex}{0ex}}\mathrm{The}\mathrm{ball}\mathrm{bounced}\mathrm{to}a\mathrm{height}\mathrm{of}2\mathrm{cm}\mathrm{on}\mathrm{the}\mathrm{third}\mathrm{rebound}.\phantom{\rule{0ex}{0ex}}\mathrm{What}\mathrm{was}\mathrm{the}\mathrm{height}\mathrm{that}\mathrm{Oliver}\mathrm{dropped}\mathrm{the}\mathrm{ball}\mathrm{from}?$

$\mathrm{Let}\mathrm{original}\mathrm{height}\mathrm{be}H\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}(\frac{1}{3})(\frac{1}{3})(\frac{1}{3})H=2\mathrm{cm}\phantom{\rule{0ex}{0ex}}\frac{1}{27}H=2\phantom{\rule{0ex}{0ex}}H=54\mathrm{cm}\left(\mathrm{ans}\right)$ 



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