A 100 m long train is traveling from North to South at a speed of 30 ms-1. A bird is flying from South to North at a speed of 10-1. How long will the bird take to, cross the train?
A. 3 s
B. 2.5 s
C. 10 s
D. 5 s
Answer:B
A 100 m long train is traveling from North to South at a speed of 30 ms-1. A bird is flying from South to North at a speed of 10-1. How long will the bird take to, cross the train?
A. 3 s B. 2.5 s C. 10 s D. 5 s