In a parking arrangement, the (r)th row has (7r) vehicles. How many vehicles will there be in (56) rows?
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Answer and explanation
Correct answer: (11172)
Total vehicles are (7S_{56}=7\times1596=11172). In a pattern like (7r), take (7) outside the sum.
Frequently asked questions
What is the correct answer to this question?
(11172)
Why is this the correct answer?
Total vehicles are (7S_{56}=7\times1596=11172). In a pattern like (7r), take (7) outside the sum.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Sequences and Progressions. Topic: Sum of first n natural numbers.
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