Question

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Answer 1

Answer:

dear what to explain in it the answer is given so what do you want

Step-by-step explanation:

Answer 2

Answer:

Distance covered on foot = x km

Distance covered in bicycle = 25-x km

Time to cover on foot = x/3.5 hours ( Speed = Distance/Time )

Time to cover in bicycle = (25-x)/9 hours

Given, total time taken = 4 hours

x/3.5 + (25-x)/9 = 4

On simplifying, we get

x = 7 i.e Distance covered on foot