Question
If a car runs at 30 km/hr, it reaches its destination late by 15 minutes but if runs at 45 km/hr it is late by 7 minutes. What is the correct time for the journey?
Solution
Distance = Difference in time x (S1 x S2)/(S1 – S2) D = [15 – 7]/60 x {(30 x 45)/[45 – 30]} => (8/60) x (30 x 45)/15 => 12 km Time, T = D/S (take any one of the speed) => 12/30 = 12/30 x 60 = 24 minutes Then, correct time is 24 – 15 = 9 minutes
More Time and distance Questions
- Anshul lives on 15th floor and Keshav lives on 55th floor. Anshul goes up at a rate of 36 floors per minute and Keshav comes down at a rate of 44 floors pe...
- In a 250 metres race, 'K' beats 'M' by 50 metres, and 'M' beats 'L' by 20 metres. By how many metres does 'K' beat 'L'?
- Riya travels 45.5 km in 2 hours and 30 minutes. How much distance will she cover in 4 hours if she increases her speed by 3 km/h?
- In a 500-metre race, 'M' beats 'O' by 100 metres, and 'O' beats 'N' by 75 metres. Find by how much distance 'M' beats 'N'.
- A thief is spotted by a policeman from 800m. When the policeman starts chasing, the thief also starts running. If the speed of the thief is 32km/h and that...
- Neha takes 10 hours to travel a certain distance at a speed of 20 km/h. What should be her new speed to complete the same journey in 5 hours?
- A wheel has a diameter of 28 meters and rotates at a speed of 25 revolutions per minute. How much distance will the wheel travel in 32 minutes?
- Rohit jogs at a pace of 14 km/h and takes 11 hours for his fitness trail. What speed does he need to jog at to finish it in just 7 hours?
- The speeds of Arun and Bhanu are in the ratio of 3:4, respectively. Both begin their journey simultaneously to cover a distance of 13.5 km. Bhanu completes...
- The ratio of the speed of car to that of a train is 15:22. If the speed of the train is 35 Km/hr more than that of the car, what is the speed of the car?
