Question

radius of a circle is 70m and speed is 4km/h than find the time of 2 round of circle garden ​

Answer 1

Answer:

13.14 minutes

Step-by-step explanation:

perimeter of the circle = 2πr = 2π×70 = 439.82 m

thus, distance covered for 2 rounds = 2×439.82

distance = 879.64 m = 0.879 km

speed = distance/time

4 = 0.879/T

T = 0.879/4 = 0.219 hrs

0.219 × 60 = 13.14 minutes

Answer 2

Answer:

79.13sec

Step-by-step explanation:

round means circumference of a circle = 2πr

so we have r=70m

ie. 2×2×3.14×70=879.2

so the time of 2 round of a circle garden

time = distance/speed

879.2×11.11 =79.13sec....