Question

help me to solve thjs question​

Answer 1

SEE THE AATACHMENT YOUR ANSWER IS THIS AND I THINK IT IS CORRECT

#TOGETHER WE GO FAR✔✔

Answer 2

given, A=a+b/2--------------------eq-1

we know that , s= n/2(a+l)

here,a=a,l=b

so, s=n/2(a+b)---------------------------eq-2

so, s=n[a+b/2]

A=a+b/2

equate 1&2

then , S/n=A

S/A=n