1 pizza was delivered at a house.then 2 in the other house.like this 3 in the third house.....and more till 10 in the 10th house. find the number of pizza delivered.
Answers
Answered by
0
Answer:
55
Step-by-step explanation:
it is in A.P
a=1
d=1
n=10
Sn=n/2*[2a+(n-1)*d]
S10=10/2*[2<1>+(10-1)*1]
S10=5*[2+9]
S10=5*[11]
S10=55....... ANSWER
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Answered by
2
Answer:
s10 = 5 *(11) this will be your answer
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