Question

plzz answer fast.... ​

Answer 1

Answer:

ans is 36

Step-by-step explanation:

1+5=6,6+5=11 and so on you do till 16+5 = 21 then 21+5=26+5=31+5= 36. ten sum of all this is 148. you try and check that my ans is write or wrong.

hope it helps you......

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Answer 2

Step-by-step explanation:

a=1,d=5,an=x,Sn=148

an=a+(n-1)d

x=1+5n-5

x=5n-4

sn=n/2[2a+(n-1)d]

148=n/2*5n-3

296=5n^2-3n

by solving,n=8,-37/5

x=5*8-4

x=36