Let the required number of minutes = M Total minutes between 3o'clock and 6o' clock = 180 minutes M + 50 + 4M = 180 5M + 50 = 180 5M = 130 M = 26 minutes.
If 34 men completed 2/5th of a work in 8 days working 9 hours a day. How many more man should be engaged to finish the rest of the work in 6 days working 9 hours a day ?
In a 40 litre mixture of alcohol & water, the ratio of alcohol and water is 5 : 3. If 20% of this mixture is taken out and the same amount of water is added then what will be the ratio of alcohol and water in final mixture?