Question

Parul covered the first 48 kms of her joumey at 50 kmph, the next 35 km at 40 kmph and the remaining distance in 9 minutes and 54 seconds The averag
for the entire journey was 58 kmph What was the length of Parul's last stretch of joumey?
33km
25 km
42 km
None of the above​

Answer 1

Step-by-step explanation:

none of these is your answer

please mark me as brainliest

Answer 2

Answer:

The length of Parul's last stretch of journey: 33km

Step-by-step explanation:

Let's assume that the length of the last stretch of Parul's journey is "x" km.

To find x, we can use the formula for average speed, which is:

average speed = total distance / total time

We know that Parul covered the first 48 km at 50 kmph, which took her 48 / 50 = 0.96 hours.

We also know that she covered the next 35 km at 40 kmph, which took her 35 / 40 = 0.875 hours.

Finally, we know that she covered the last x km in 9 minutes and 54 seconds, which is 0.165 hours.

Therefore, the total time for the entire journey is:

0.96 + 0.875 + 0.165 = 2 hours

We also know that the average speed for the entire journey is 58 kmph.

Using the formula for average speed, we can set up the following equation:

58 = (48 + 35 + x) / 2

Simplifying this equation, we get:

116 = 83 + x

Subtracting 83 from both sides, we get:

x = 33 km

Therefore, the length of Parul's last stretch of journey is 33 km.

So the answer is option (a) 33 km.

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