While going to office, Sneha travels at a speed of 10 km/h and on her way back, she travels at a speed of 15 km/h. What is her average speed for the whole journey?

14 km/h 12 km/h 11 km/h 13 km/h

12 km/h

We know , Average speed = \(\frac{2 × S1 ×S2 }{S1 + S2}\) According to question , Average speed = \(\frac{2 × 10 × 15 }{10 + 15}\) = 12 km/h