Question

. A man ealks at a speed of 6 km/hr for 1 km and 8 km/hr
for the next 1 km. What is his average speed for the walk
of 2 km ?​

Answer 1

Answer:Average speed =6.86 km/hr

Explanation: average speed = total distance/total time

total distance is apparently 2 km

time= distance/speed

time -1=1 km / 6 km/h =1/6 hr

time -2 = 1 km / 8 km/hr=1/8 hr

total time =1/6+1/8=14/48=7/24 hr

average speed = 2 km/ (7/24 hrs) = 6.857

6.857 rounding off 6.86 km/hr

Answer 2

Given -

• A man walks at a speed of 6 km/hr for 1 km and 8 km/hr for next 1 km

Formulae used -

• Speed = Distance / time
• Time = Distance / time

Solution -

• Speed = Distance/Time

6 km/hr =Distance/Time

6 km/hr=1km/Time

• Time=Distance/Speed

1 km/6 km/hr

1/6hr

• Speed = Distance/ Time

8 km/hr=1 km/Time

• Time=Distance/Speed

1 km/8 km/hr

1/8 hr

Conclusion -

So,we should add the speeds of both

• 6km/hr+8km/hr

14km/hr