Question

Area of circular field is154 m find the time taken by an athlete to complete 3 rounds if she is jogging at the rate of 7 km per hr

Answer 1

hello users.....

given that :
area of circular field = 154 m²

speed of athlete = 7 km/h

we have to find :
time taken by athlete to complete 3rounds = ?

solution:-
we know that :-
area of circular track (circle) = πr²
&
circumference of track (circular) = 2πr

here ,
from given :
πr² = 154 m²
=> r = 7 m

now ,
circumference of track = 2πr = 2π×7
= 14 π = 43.96 m

now,
time taken by the athlete = (distance covered by athlete ) / ( speed of athlete)

= 43.96 / 7 = 6.28 h
= 6h 16m 48sec Answer

⭐⭐ hope it helps ⭐⭐