A plane and a cloud?
How long does a 70 meter plane, at a speed of 80m/s, take to cross a 4000m cloud?
- RealProLv 72 months agoFavourite answer
The speed is reported to only 2 significant digits and even if it was more than that, you can't measure accurately the size of a cloud. So we estimate the answer as 4000 / 80 s = 50 s
How long does a 70 m train, at a speed of 80.0 m/s, take to cross a 4.00 km tunnel?
Assuming "time to cross" means the time to when its front end enters the tunnel to when its back end leaves the tunnel,(4000 + 70)/80.0 s = 50.9 s
- BJJLv 72 months ago
From nose to tail 50.875 seconds
- oubaasLv 72 months ago
t = (4,000+70)/80 = 50.9 sec