Acertain car travels 20 km east then turns south for 13 km finally the car turns east again for 6 km

a^2+b^2=c^2

20km^2+13km^2=c^2

400km^2+169km^2=c^2

23.853720...km

Total distance

total displacement

Explanation:

Total distance moved by the car is total path length of the car

now similarly we will have

total displacement of the car towards East

total displacement of the car towards South

now net displacement of the car is given as

in physics zero. in muscle fatigue could be high

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y