# A school has 9 periods a day each of 50 minute duration. How many periods will there be if the duration of every period is reduced by 5 minute

Dear Student,

$9periodsof50minuteseach\phantom{\rule{0ex}{0ex}}sototaldurationofschool=9\times 50minutes\phantom{\rule{0ex}{0ex}}ifeachperiodisreducedby5minutesi.e.(50-5)minutes/period=45minutes/period\phantom{\rule{0ex}{0ex}}so,newtimedurationofeachperiod=45minutes\phantom{\rule{0ex}{0ex}}so,Newno.ofperiods=\frac{totalschoolduration}{Newtimedurationofeachperiod}=\frac{9\times 50minutes}{45minutes/period}=\frac{450minutes}{45minutes/period}=\overline{)10Periods}\phantom{\rule{0ex}{0ex}}$

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