Question

8. A man walks 6 km at 12 km/h and returns at 10 km/h. Find his average speed. ey at 40 km/h the next 180 kn + A​

Answer 1

Answer:

Avg speed = 120/11 Km/hr

Step-by-step explanation:

Ist Case

Distance = Speed × time

6 = 12 × t

t = 1/2 hour

IInd Case

Distance = Speed × time

6 = 10 × t

t = 6/10 = 3/5 hour

Avg speed = Total distance traveller/ Total time taken

= 6+6/ 1/2+3/5

Use cross multiplication method = 12/5+6/10 = 12×10 /11

Avg speed = 120/11 Km/hr