Answer to Question #299091 in MatLAB for Shanu

Question

1.     Logs are stacked in a pile with 24 logs on the bottom row and 10 on the top row. There are 15 rows in all with each row having one more log than the one above it. (Use S_n=n/2[2a+(n-1) d])

a)      How many logs are in the stack?

Answer 1

>> a = 24;   % logs on the bottom row
>> n = 15;   % number of rows
>> d = -1;   % increment from row to row
>> Sn = n/2 * (2*a + (n-1)*d)
Sn =
   255
>>