Question

From-Motion class 9.​

Answer 1

Answer:

15√2

Explanation:

perimeter of square of 15m =4x15=60m

assumptions :

the man completes 60m in 60seconds.

solution :

time : 2min 30.seconds = 2x60+30= 150 seconds

speed = distance/time= 60m/60s = 1m/s

distance travelled in 150 s = speed x time

= 1 x 150s= 150m

draw of square of 15m side .

150m / 60m = 2.5 turns of the square

This means that the person has completed 2 full rounds of the perimeter and half of the third round of the perimeter.

His position is diagonally opposite his starting point.

Displacement is the direct staright line distance from his startinv point.

this means the diagonal of the square.

the diagonal of the square by Pythagoras theorem

hypothenus= √ (15x15)+(15x15)

=√2x(15x15)

= 15√2m