a meeting hall has 20 seats in the First row 24 seats in the second raw 28 states in the third Rock and so on and has in all 30 Raj .how many seats are there in the meeting hall
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we know that Sn=n/2(a+(n-1)d)
n=30
a=20
d=4
substring values u get answers I think it is 2340
n=30
a=20
d=4
substring values u get answers I think it is 2340
mbksite41:
can i know the answer
i am sorry in the formula it is 2a
really sryy
formula is n/2(2a +(n-1)d)
this answer is write
mmm wch class r u studying
10tb class
step by step solve
it is right
really it is very true
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