Divide 180 in a ratio of 4:5:9

40 + 50 + 90

Step-by-step explanation:

180 = 4:5:9

180 = 4x + 5x + 9x

Add the x's

180 = 18x

Divide by 18 on both sides of the equation

x = 10

Substitute in x

180 = 4(10) + 5(10) + 9(10)

Multiply

180 = 40 + 50 + 90

Hope this helps :)

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