Question

A car completes a journey of 315 km in 4¾ hours. the first one-third of the journey was performed as 60 km/hr. calculate the speed for the rest of journey.

I'm asking this question 2nd time please answer this question it's urgent​

Answer 1

Answer:

answer is given

Step-by-step explanation:

The question is a little ambiguous, but i’ll try.

I believe you mean half distances. Let the total distance be 2x. We know that speed is distance by time. Let the time for the first half be t1 , and for the second half, t2 .

With that said, we have,

t1+t2=11hrs

xt1=30km/hr

xt2=25km/hr

Which gives,

t1=x30

t2=x25

Therefore,

x30+x25=11hr

By cross multiplying,

30x+25x750=11hr

implies,

55x=11∗750

5x=750

x=150.

So the total distance is 2 times 150, ie 300 km.

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if by chance you meant half time, then answer is too obvious, 165 + 137.5 = 302.5

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I would appreciate if anyone mark me brainlist