A person covers 50% distance at the rate of 12 km/hr and the remaining distance at 16km/hr . Find his average speed during the journey ?
Answers
Answer:
Step-by-step explanation:
let the total distance be =x km
time taken for first half distance = Distance/Speed
= x/2 /12
= x/2 * 1/12
= x /24 hours
time taken for second half distance = Distance /Speed
= x/2 / 16
= x/2 * 1/16
=x /32 hours
Total Time = x/24 + x/32
= 4x+3x /96 = 7x/96
so average speed = DISTANCE/TIME
= x/ 7x/96
= x * 96/7x
= 96/7 = 13.71 km/hr