JEE Mains · Physics · STD 11 - 2. motion in straight line
A vehicle travels \(4\,km\) with speed of \(3\,km / h\) and another \(4\,km\) with speed of \(5\,km / h\), then its average speed is \(..........km/h\)
- A \(4.25\)
- B \(3.50\)
- C \(4.00\)
- D \(3.75\)
Answer & Solution
Correct Answer
(D) \(3.75\)
Step-by-step Solution
Detailed explanation
\(\frac{2}{ V _{ av }}=\frac{1}{3}+\frac{1}{5}=\frac{8}{15}\) \(V _{ av }=\frac{15}{4}=3.75\,km / h\)
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