Question

ramkali required rs.2500 after 12 weeks to send her daughter to school. she saved rs.100 in the first week and increased her weekly saving by rs.20 every week. find whether she will be able to send her daughter to school after 12 weeks. what value is generated in the above situation

Answer 1

find the answer to the given question above


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Answer 2

AP = 100+120+140+An

N = 12

A = 100

D = 20

An = A+(N-1)D

= 100+(12-1)20

= 100+220 = 320

The required An = 320

Then , Sn = N÷2{2A+(N-1)D}

= 12÷2 {2×100+(12-1)20}

= 6×450 = 2520

So , she will be able to send her daughter to school after 12 weeks .