A 1000kg boulder with a 20m radius is rolling down a ramp to crush Indiana Jones. If the ball rolls from rest and then without slipping reaches a speed of 10m/s at the end of the ramp, in 2.0s, what is the angular acceleration of the ball as it rolls down the ramp?

the total distance traveled by the car is

30km + 49km = 79 km .

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