Question
A car starts from point A and travels at a speed of 60
km/h for the first 2 hours, then increases its speed to 80 km/h for the next 3 hours. After that, it reduces its speed to 50 km/h for the next 4 hours. What is the average speed of the car for the entire trip?Solution
Distance covered in the first 2 hours = 60 km/h × 2 = 120 km. Distance covered in the next 3 hours = 80 km/h × 3 = 240 km. Distance covered in the next 4 hours = 50 km/h × 4 = 200 km. Total distance covered = 120 km + 240 km + 200 km = 560 km. Total time taken = 2 hours + 3 hours + 4 hours = 9 hours. Average speed = Total distance / Total time = 560 km / 9 hours = 62.22 km/h ≈ 62 km/h. Correct option: b
What is the minimum percentage of Advance tax to be paid till 15 dec?
Which G7 country is likely considering withdrawing from China's Belt and Road Initiative (BRI)?
What is the unit of kinetic visibility?
Which of the following sites do “Not” have nuclear power plant?
Which law was formulated in 1662 and concluded that the product of pressure and volume remains almost constant?
Which cell organelle has a central core of a crystalline material called a nucleoid composed of urate oxidase crystals?
Ajit Kumar Mohanty took over the charge of Chairman, _____, in May 2023.
Which country has won the historic double Gold Medal at the “45th Chess Olympiad” played in Hungary?
Which of the following is/are the CORRECT statements about Director General of the Indian Coast Guard ?
1. DG Rakesh Pal has been appointed as th...
The AYUSH Ministry has launched ‘HCCR' Portal recently. With which this portal is associated?
