9
Q:
A) 20 hrs | B) 18 hrs |
C) 22 hrs | D) 20.5 hrs |
Answer: A) 20 hrs
Explanation:
Explanation:
Time taken by both Meghana and Ganesh to work together is given by =
√t1 x t2
Where
t1 = 32 hrst2 = 12 12 hrs = 252 hrs
Therefore, time took by both to work together =
√32 x 252 = √16 x 25 = 4 x 5 = 20 hrs