Let present age of ‘A’ be ‘a’ years So, 3(a – 20) = a + 12 Or, 3a – 60 = a + 12 Or, 2a = 72 Or, a = 36 Present age of ‘B’ = 5/4 × {36 + 12} – 12 = 60 – 12 = 48 years Present age of ‘C’ = 38 × 3 – 36 – 48 = 30 years
Buses A and B are moving around a circular ground of radius 350 m. If the speeds of the buses A and B are 15 m/sec and 20 m/sec respectively, then what ...
A train would take 20 seconds to cross a stationary pole. If the train was 200m shorter, it would have taken 10 seconds less. Find the speed of the train.
Parag starts chasing a Vipul, 4 hours after the Vipul starts running. Parag takes 5 hours to catch the Vipul. If the average speed of the Parag is 45 km...
The speed of a bike increases by 4 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 27 km, the find the total distance tra...
A train leaves a station and travels for 4 hours at a speed of 80 km/h. It then increases its speed to 100 km/h for the next 3 hours. What is the total ...
A car travels a distance of200 km at the speed of 50 kmph. If it covers the ne×t 160 km of its journey at the speed of 80 kmph and last 80 km of i...
A car running with a speed of ‘x’ m/sec makes 5 rounds of a circular field having radius 42 metres, in 10 seconds. Find the time taken by ca...
The sum and difference of the speeds of the two cars are 70km/h and 30km/h respectively. In a race, if the car with more speed finishes 6 minutes earlie...
A traveler moves a distance in three intervals. In the first 'u - 15' km, he travels at 20 km/h, in the next 'u' km at 40 km/h, and completes the journe...
Excluding stoppage, the speed of the bus is 66 km/hr, and including stoppage, it is 55 km/hr. How many minutes does the bus stop per minute?