Question

Please answer question 2

Answer 1

radius of circle=R

time taken for one round=20 sec

total time taken for journey=45 sec

=20+20+5

since after each round displacement of the body is zero therefore it doesn't matter if we include those 20 sec in the total time

new total time=5 sec

in 20 sec body completes the full round=2πR

therefore in 5 sec it covers

=2πR*5/20

=πR/2

therefore the body has covered 1 quarter of circle

joining the final and initial points to form a right triangle and applying pythagoras theorem

displacement=√(R²+R²)

=√2 R

option 2

Hope this helps

Answer 2

Answer: hi

root of (R2+R2)

=root of 2R

Which is option 2