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Class 10 math (India)

Course: Class 10 math (India) > Unit 5

Lesson 5: AP word problems
Math
Class 10 math (India)
Arithmetic progressions
AP word problems
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Word problems: Sum to n terms of an arithmetic progression

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Problem

It took Samia 20 minutes to write a 2, comma, 300 word essay. She typed 20 words in the first minute. She increased the number of words by a constant, c, every minute.
Find c.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
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