- A25.2
- B52.5
- C21
- D26
Step-by-Step Solution
Together they type 1/42 + 1/63 = (3 + 2)/126 = 5/126 of the record per hour, so they need 126/5 = 25.2 hours. (52.5 is just the average of 42 and 63.)
Answer: A) 25.2
Asha needs 42 hours to key in a court record by herself, and Balwinder needs 63 hours. Typing it together, how many hours will they take?
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