Problem 8P

(Note: In Problems, assume a number like 6.4 is accurate to ; and 950 is unless 950 is said to be “precisely” or “very nearly 950, in which case assume 950 )

Add (9.2 x 103s) + (8.3 x 104s)

Solution 8P As we know that the speed is defined by the total distance covered divided by the total time taken, which is the average speed, let’s calculate it by the same way. In this case the total distance covered by the security guard is 110m. He travelled this distance in 240 secs. So, avg. speed = total distance / total time. = 110m / 240s = 0.458 m/s CONCLUSION: The speed of the security guard is then 0.458 m/s.