Question

Q. NO. 2) A man riding on a bicycle covers a distance of 60 km in direction of wind a
comes back to his original position in 8 hours. If the speed of wind is 10 km/hr, find th
speed of the bicycle.​

Answer 1

Answer:

20 km/h

Step-by-step explanation:

Let the speed of bicycle be v km/h

I.

Speed of bicycle in the direction of wind = (v+10) km/h

Distance covered = 60 km

Time taken (x) = 60/(v+10) hours

II.

Speed of bicycle in the direction of wind = (v - 10) km/h

Distance covered = 60 km

Time taken (y) = 60/(v - 10) hours

Given,

x + y = 8 hours

Substituting the values of x and y,

we get v = 20 or v = -5

Speed cannot be negative

Thus, speed = 20 km/h