assuming each lunchbox has 2 tnts in it, we have 3 lunchboxes. 3 times 2 is 6, so the force of 6 tnts. 1 good tnt can detonate about 7.5 meters of area, and if we spread the lunchboxes out to an array with 1 meter from each other, this gives us a perimeter of 6 feet. 6 x 7.5 = 45. therefore, the radius of the explosion will be 45 meters.
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