Aplane accelerates down a runway. the plane accelerates at 2 m/s/s for 10 seconds and obtains a speed of 20 m/s. what speed would a second plane obtain if it had double the acceleration for double the time of the first plane? a) 20 m/s b) 40 m/s c) 80 m/s d) 160 m/s

here acceleration initially is given as 2 m/s/s for total time of 10 s

so in above situation the final speed will be 20 m/s

now here if acceleration is double as well as the time is also double

so now we will have

so now the final speed is given as

it may be wrong but i think its a

hey , the answer is c