Mathematics · Time and Work
A can type 50 words in 1 minute and B can type 40 words in 1 minute. First, A types for 1 minute, and then B types for the next 1 minute, and so on. Typing in this manner alternately, they typed 980 words. How much time did they take to type 980 words?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 121 minutes 45 seconds✓
- 221 minutes 80 seconds
- 320 minutes 35 seconds
- 420 minutes 15 seconds
Correct answer
21 minutes 45 seconds
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