An object with a higher surface area would emit more or less infrared radiation or emit and absorb

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach