Question

7. A man walks half the distance at the rate of 3 km. per hour and after that runs the rest of the distance at 7 km-p-hour. If he takes total times 10 hours. How far he covers the distance.​

Answer 1

Answer :

He travels 42 km

Step-by-step explanation:

Let distance be x km

Distance =x/2

Speed = 3 km/hr

Time =x/2*1/3

=x/6

Similarly,

Distance =x/2

Speed = 7 km/hr

Time =x/2*1/7

=x/14

BTP

x/6+x/14=10

Or, 7x/42+3x/42=10

Or, 10x=420

Or, x=420/10

=42km