Question

14. If a man travels at a speed of 30 km/h, he
reaches his destination 10 min late and if he
travels at a speed of 42 km/h, he reaches his
destination 10min early. The distance
travelled is
(a) 36 km (b) 35 km (c) 40 km (d) 42 km



please answer me friends ​

Answer 1

Song Name: Thanks Zone Ka Maara

Lyrics By Rohit Singh.

Artist: Rohit Singh.

DJ Music by Rohit Singh.

दिल बेचारा

थैंक्स ज़ोन का मारा

कोई तो बतादे ब्रैंलिएस्ट मार्क करू

कोई बतादे ब्रैंलिएस्ट मार्क करू

दिल बेचारा

थैंक्स ज़ोन का मारा

(Music)

याद है मुझे तेरे ब्रैंलिएस्ट लिस्ट लिस्ट लिस्ट

हर दे दे दे दे

क्यों थैंक्स क्यों न दू

दू या न दू

(Music)

दिल बेचारा

थैंक्स ज़ोन का मारा

दिल बेचारा

थैंक्स ज़ोन का मारा।

Please tell me how much good is this song?

Answer 2

Answer:

Let the distance be x km.

Then, correct time at a speed of

30 km / h = \( \Large \frac{x}{30} \) - \( \Large \frac{10}{60} \)

Correct time at a speed of 42 km /h

= \( \Large \frac{x}{42} \) + \( \Large \frac{10}{60} \)

=> \( \Large \frac{x}{30} \) - \( \Large \frac{10}{60} \) = \( \Large \frac{x}{42} \) + \( \Large \frac{10}{60} \)

=> \( \Large \frac{x}{30} \) - \( \Large \frac{x}{42} \) = \( \Large \frac{2}{6} \)

=> \( \Large \frac{x (12) }{1260} \) = \( \Large \frac{2}{6} \)

=> 72 x = 1260 \( \Large \times \) 2

=> x = \( \Large \frac{1260 \times 2}{72} \) => x = 35 km