1
Q:
A) 3 hours | B) 3 hours 15 minutes |
C) 3 hours 30 minutes | D) 3 hours 45 minutes |
Answer: D) 3 hours 45 minutes
Explanation:
Explanation:
Let them take x hours working together
1/x = 1/10 + 1/6 = 8/30
X= 30/8 hours = 15/4 hours = 3 hours 45 minutes