A train started from Colombo Fort towards Jaffna at 3pm (time t 0) with velocity v(t) = 20t+ 50 kilometre per hour, where t is measured in hours. Find the distance covered by the train at 5pm. ​

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters