every_floor_of_a_104_storey_skyscraper_is_4_m_high_if_a_baloon_rises_3_m_every_sec_how_long_will_it_take_to_rise_frm_the_36_floor_to_the_96_floor
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96-36=60 storeys
60x4=240m
240/3=80 sec
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