Question

5.6+6.7+7.8 +____to 25 terms

Answer 1

here,
a=5.6
d=6.7-5.6
=1.1
therefore the following A.P are :- 5.6, 6.7, 7.8,add 1.1 till the 25th term.

Answer 2

a=5.6, d= 6.7-5.6=1.1
answer is 32