Question

an athletecompletes a circulartrackofradious 100m in 40 seconds. findhisdistanceanddisplacementafter(a) 3minutes(b) 4minutes

Answer 1

Hello friend,

He completes one round in 40 sec so-
B- 4 mins = 240 secs
240 divided by 40 = 6
Ans. He will complete 6 rounds (600m) in 4 mins

A- 3 mins = 180 secs
180 divided by 40 = 4.5
Ans. He will complete 4.5 rounds (450m) in 3 mins

Hope this helps!!!

Answer 2

Distance after 3 minutes: -
2Πr × (3×60)/40
200Π×9/2
900Πm
Distance after 4 minutes:-
2Πr × (4×60)/40
200Π×6
1200Πm

Displacement after 3 minutes:-
2Πr × 20/40
100Πm
Displacement after 4 minutes:-
2Πr × 0/40
0m