In a 1000 m race. A gives B a start of 100 meters and defeats him by 100 seconds. IF speed of A is 5 m/s, then speed of B is :
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 3 m/s
$\text{Time taken by A} = \frac{\text{Total Distances}}{\text{Speed of A}}$
$=\frac{1000}{5}=200$ seconds
⇒ Time taken by B = $200 + 100 = 300 s$
Speed = $\frac{900}{300}=3m/s$