Explain how to how to find which is greater: 1/4 of 12 or 1/3 of 12

multiply the number by its fraction.

Step-by-step explanation:

1/4 x 12 = 12/4 = 3

1/3 x 12 = 12/3 = 4

since the airplane is moving with constant speed then the distance travelled can be calculated by x=u*t

in km/h would be:

x=640*3.5=2.240 km

in m/s would be:

u=640 km/h= 640.000 m/h =640.000/ 3600 m/s =177.8 m/s

t= 3.5 h= 3.5 * 3600 s=12.600 s

then x=u*t= 177.8*12.600= 2.240.280 m