Question

Ratan travelled $300km$ in $20$ hours. He covered $3/5th$ of the distance in $2/5th$ of the time. At what speed did he cover the remaining distance ?

• A. $10$
• B. $12$
• C. $15$
• D. $71/2$

Answer 1

The correct option is A $10$

$\frac{3}{5}$ of $300=180$ kms in $\frac{2}{5}$ of $20$ hrs $=8$ hrs

So remaining $120$ kms in $12$ hrs

speed $=\frac{120}{12}=10$ km/hr