alleryA bus goes at 40 km/h and returns by the same road at 60 km/h. Average speed overall?
A50 km/h
B52 km/h
C45 km/h
D48 km/h
Answer & Solution
Correct answer: D. 48 km/h
For distance d each way, time is d/40 plus d/60, so 2d divided by that is 48 km/h.
Keep practising Chemical Changes, Reactions & Atmospheric Pollution
Browse all Chemical Changes, Reactions & Atmospheric Pollution questions for ICSE Class 10, or explore more Chemistry topics.
Related questions
A tuning fork vibrates 50 times each second. Its time period isWhich frequency can a healthy young person hear?Two identical sirens sound, one on a parked car and one on a car speeding towards you. WhaWhy does the speed of sound in a gas change with temperature?A vibrating guitar string makes a sound. What does it do to the surrounding air?What is damping?An observer moves away from a stationary source of sound. What do they receive?You drive an oscillating object far above its natural frequency. What happens to the ampli