Question

please solve my numerical problem 1

Answer 1

speed = 20m/sec
time = 1/2 hrs = 30 minutes = 1800 sec.
distance = s × t = 20 × 1800 = 36000 m = 36 km

Answer 2

v is 20m/s t = 30×60 = 1800s v=d/t
so d= vt = 1800×20 = 36000m = 36km