Brandon is in the school play. He has 10 lines. Each line takes 30 seconds to read. How many minutes will it take Brandon to read all his lines? A
2 minutes

B
5 minutes

C
7 minutes

D
10 minutes

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

the answer is 21%.