110. Light with an average flux of $20 W/cm^2$ falls on a non-reflecting surface at normal incidence having surface area $20 cm^2$. The energy received by the surface during time span of 1 minute is :

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$24 	imes 10^3$ J

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110. Light with an average flux of $20 W/cm^2$ falls on a non-reflecting surface at normal incidence having surface area $20 cm^2$ . The energy received by the surface during time span of 1 minute is :

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110. Light with an average flux of 20W/cm220 W/cm^220W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20cm220 cm^220cm2. The energy received by the surface during time span of 1 minute is :

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110. Light with an average flux of $20 W/cm^2$ falls on a non-reflecting surface at normal incidence having surface area $20 cm^2$ . The energy received by the surface during time span of 1 minute is :