Saved Bookmarks
| 1. |
.A car moves with a speed of 30km/h for half- an- hour; 25km/h for 1 hour and 40km/h for 2 hour. What is the average speed of the car? |
|
Answer» Answer: 34.28km/HR Explanation: 1. 30km/hr for 1/2hr so 30/2 =15km 2. 25km/hr for 1hr so 25 km 3. 40km/hr for 2 hr so 40×2=80 km 15+25+80=120km now we have total distance,, 1/2 hr+1hr+2hr= 3 1/2 hr = 7/2 hr now we have total TIME,,,, average speed= total distance/total time taken 120/7/2 = 120×2/7 = 240/7= 34.28km/hr
Please mark as brainliest if it HELPS you |
|