The number of days (d) required to build a mall varies jointly with the floor area (a) and the number of stories (s),and inversely with the number of workers (w),if 120 men can build a two story mall with a floor area of 300m² in 30 days, how long will it take 400 men to build a 5 story mall with an area of 1080m²
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Step-by-step explanation:
Let it will take d days
=> d/30=(5×1080×120)/(2×300×400)
= (600×1080)/(600×400)
=>d=(1080×30)/400 = 81 days.
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