Twelve children take sixteen days to complete a work which can be completed by 8 adults in 12 days. After working for 3 days, sixteen adults left and six adults and four children joined them. How many days will they take to complete the remaining work ?

A. 3 days
B. 4 days
C. 6 days
D. 8 days

Submitted by: মোঃ আশাদুজ্জামান

Solution:

12×16×C=12×8×A

Or, A:C=2:1 [Efficiency ratio]

Let, Required time be T days

Applying MDH Method:

12×8×2=16×2×3+(6×2+4×1)×T

Or, 192=96+14T

Or, T=6

Answer:6 days

Correct Answer: 6 days ✔

Last Updated: June 03, 2020