Question

Raj drives at $56km/h$ and completes a journey in $4$ hours. If he drives at $64km/h$, what is time taken to complete the same journey?

• A. $3\frac{1}{2}hrs$
• B. $3\frac{3}{4}hrs$
• C. $2\frac{2}{5}hrs$
• D. $3\frac{4}{7}hrs$

Answer 1

The correct option is A $3\frac{1}{2}hrs$

Using Formula $Speed$ $=\frac{Distance}{Time}$

Distance of Journey$=Speed\times Time=56\times 4=224$

Now, speed is increased and Distance of Journey remains same

$\Rightarrow 224=64\times Time$

$\Rightarrow Time=3.5=3\frac{1}{2}hrs$

Therefore Answer is $\left(A\right)$