Question
Average speed of ‘A’ during a 20-hour journey is 28
km/h. If he covered the first 240 km of his journey at a speed of 20 km/h, then find the speed at which ‘A’ travelled during the remaining journey.Solution
Total distance covered by ‘A’ = 20 × 28 = 560 km Time taken to cover 240 km = 240/20 = 12 hours Time taken to cover remaining distance = 20 – 12 = 8 hours So, required speed = {(560 – 240)/8} = 40 km/h
Car A departs from Varanasi towards Lucknow at 8:00 AM, traveling at a speed of 48 km/h. Car B starts from Lucknow towards Varanasi at 9:15 AM, with a s...
A bike departs from point X at 9:00 AM toward point Y, traveling at a speed of 45 km/h. Two hours later, a car starts from point X toward point Y at a s...
Anshul lives on 19th floor and Keshav lives on 46th floor. Anshul goes up at a rate of 24 floors per minute and Keshav comes down at a rate of 30 floo...
A mother left her child at Bus stop 'P' in a bus station at 6:00 a.m. Four hours later, a bus departed from Bus stop 'Q' to Bus stop 'P' and passed the ...
- Ravi and Mohan start walking on a circular path simultaneously in the same direction. Ravi walks at 12 m/s, while Mohan walks at 18 m/s. If the track is 60...
A train covers a certain distance at a speed of 24 km/h and the next same distance with a speed of 42 km/h and the next same distance with a speed of 72...
The ratio of speeds of ‘E’ and ‘F’ is 11:5, respectively. If the sum of time taken by them to travel 550 km each is 80 hours, then find the diff...
A motorcycle begins its journey at point X, traveling at a constant speed of 85 km/h. Meanwhile, a car starts at point X with a speed of 60 km/h and acc...
- How far will 'Puneet' travel by the time he catches up to 'Bittu', given that 'Puneet' starts 90 km behind and moves at 45 km/h while 'Bittu' moves at 30 k...
X started to run from point ‘A’ to ‘B’ at a speed of 25 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 15 km/...
Relevant for Exams:
