Picture showing four cards in a row with labels 'first animal appears on land', 'first life form appears in the sea', 'first rocks formed on earth', and 'first flowering plants appear on land'.

a student arranged the four cards sequentially in a row on the basis of the periods when the events occurred. the card showing the earliest event was placed on the extreme left. which of these cards was placed first in the row?

terd muffin is the correct answer

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