One drier dries certain quantity of material in 24 minutes. Another drier does the same work in 2 minutes how much time will it take to do the same job when both driers are put to work ? Answers
A) 1.00 minutes
B) 1.20 minutes
C) 1.50 min
D) 1.85 min
E) 2.00 minutes

Rationale: by guess it is clear that the time taken will be less than 2 minutes and more than 1.5 mintes therefore , answer 1.85 minutes will be correct . answer - d
Answer: D