Highest 62464

The iron pipes are placed in 10 rows, one above the other so that in the highest upper row, there are 15 pipes, and in each other, there is one tube more. How many pipes are there?

Final Answer:

s =  195

Step-by-step explanation:

a1=15 n=10 d=1  a10=a1+9 d=15+9 1=24  s=(a10+a1)/2 n=(24+15)/2 10=195



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