Ananya types 28 words per minute in her first week of practice and improves by 3 words per minute every week. In which week does her speed first reach 55 words per minute?

Question

Accepted Answer

the 10th week. a = 28, d = 3. Solving 28 + (n - 1)3 = 55 gives 3(n - 1) = 27, so n - 1 = 9 and n = 10. Writing 28 + 3n = 55 (using n instead of n - 1) gives the wrong answer 9, which is the number of weeks of improvement, not the week number.

Ananya types 28 words per minute in her first week of practice and improves by 3 words per minute every week.

In which week does her speed first reach 55 words per minute?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 nth Term of an AP practice

Ananya types 28 words per minute in her first week of practice and improves by 3 words per minute every week.In which week does her speed first reach 55 words per minute?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 nth Term of an AP practice

Ananya types 28 words per minute in her first week of practice and improves by 3 words per minute every week.

In which week does her speed first reach 55 words per minute?