In a 20 degree C room, hot tea in a vacuum flask cools from 80 degrees C 2 point
to 40 degrees C in 8 hours. What will be the temperature of the tea after
another 8 hours? Talk to me (2-3 sentences) about how you arrived at this
answer. Attach a picture, if that is possible. *

work: w = fd (given)

work done by chet   =50*1 = 50 j

work done by mika =40*2 = 80 j

work done by sara =30*1.5 = 45 j

work done by bill =60*0.5 = 30 j

students in order from the greatest amount of work done to the least is mika> chet> sara> bill

hence option (b) is correct.

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

at right angles to each other