[75%" of a first order reaction was completed in "90" minutes,then "],[60%" of the same reaction would be completed in approximately (in "],[" minutes) "]

If 60% of a first order reaction was completed in 60 minutes. 50% of the same reaction would be completed in approximately.

If 60% of a first order reaction was completed in 60 minutes 50% of the same reaction would be completed in approximately :

If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately ( in minutes)... (Take :log2=0.3;log2.5=0.40 )

If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately (in minutes ) .............. (Take : log 2 = 0.30 , log 2.5 = 0.40)

If 75% of a first order reaction was completed in 90 minutes, 60% of the same reaction would be completed in approximately (in minutes ) .............. (Take : log 2 = 0.30 , log 2.5 = 0.40)

If 60% of a first order reaction was completed in 60 min, 50% of the same reaction would be completed in approximately

75% of a first order reaction was completed in 32 minutes. When was 50% of the reaction completed ?