Multiple choice

Ramesh travels at the rate of 3 km/hr and he reaches 15 min late. If he travels at the rate of 4km/h, he reaches 15 min. earlier. The distance covered by Ramesh is - रमेश 3 किमी/घं. की चाल से चलता है और वह 15 मिनट की देरी से पहुचँता है। यदि वह 4 किमी/घं. की चाल से चले तो 15 मिनट पहले पहुँच जाता है। रमेश द्वारा चली गई दूरी है:

  1. 7.5 km./किमी.

  2. 6 km./किमी.

  3. 5 km./किमी.

  4. 4.5 km,/किमी.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Let distance = d km and scheduled time = t hours. At 3 km/hr: d/3 = t + 15/60 (15 minutes late). At 4 km/hr: d/4 = t - 15/60 (15 minutes early). Subtract: d/3 - d/4 = 30/60 = 0.5, so d/12 = 0.5, giving d = 6 km. Option B is correct. The time difference between slow and fast speed is 30 minutes total.