If Sajid can type a page in 't' minutes and Salma can type a page in 's' minutes, how many pages can both type in 10 minutes?
Correct answer: B. 10/t + 10/s
- A. 10t + 10s
- B. 10/t + 10/s
- C. t/10 + s/10
- D. 10/(s+t)
Explanation
To determine how many pages Sajid and Salma can type together in 10 minutes, calculate each person's typing rate per minute. Sajid types 1/t pages per minute, and Salma types 1/s pages per minute. Together, they type (1/t + 1/s) pages per minute. In 10 minutes, they can type 10 times this rate, which is 10/t + 10/s pages. Therefore, Option B is correct. Option A incorrectly attempts to add their total time contributions instead of considering their rate per minute. Option C misinterprets the rate by dividing their individual times by 10, which does not give the number of pages typed. Option D incorrectly tries to combine their time rates, which is not relevant for finding the combined output in terms of pages typed.
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