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in a village school the student inrolment rose by 25percent in 10years if there were only 250 student in1998 how many students were in2008 |
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Answer» Answer: THERE ARE A LOT OF WAYS FOR ANSWERING THIS QUESTION I WILL TELL 2 OF THEM: This is easier but time consuming in bigger questions…. lets take your question for instance: INCREASE in first year = 5/100 * 800 [that SAYS 5 percent of 800] = 40……[then we increase the value and FIND the 1 year INCREASED student] = 800+40 = 840………[now again 5% of 840] = 5/100 * 840 = 42……. therefore students after 2 years = 800+40+42=840+42 = 882 this is KNOWN as COMPOUND INTEREST which has a formula of ………………. a=p*[1+r/100]^t(only when population increases)…where p = principal….r=rate……t=time……..as we are solving population question then p=population…….rate=rate of increase of population………a=amount of population in total after increase..….t=time……lets solve the problem now . a=800[1+5/100]^2=a=800[1+1/20]^2 =800*21/20*21/20=a=882 pls brainliest mark kro |
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