Answer:-
15th term of AP is 160

Step-by-step explanation:

Given :
a = 20d = 10n = 15

To find :
15th term of AP i.e. a15

Solution :
Here this is a question from AP where we are given first term (a) , common difference (d) and value of n. We are asked to find the nth term for value of n as 15. To solve this problem, we are using a formula. Formula for nth term of AP ::

→ an = a + ( n - 1 ) d >> Substituting given values of a, n and d

→ a15 = 20 + ( 15 - 1 ) (10)
→ a15 = 20 + ( 14 ) ( 10 )
→ a15 = 20 + 140
→ a15 = 160

So the required 15th term of AP is 160.