Question

Mohit travelled $225$ km in $4\frac{1}{2}$ hours. Raj travelled the same distance at an average speed that was $10$ km per hour faster than Mohit's average speed. What was the number of hours it took Raj to travel $225$ km ?

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

Answer 1

Answer: (C)

$3\frac{3}{4}$

Using the formula, $Speed=\frac{Distance}{time}$
Mohit speed=
$S_m=\frac{225}{4.5}=50km/h$
$S_r=50+10=60km/h$
Distance=225km
$Time=\frac{Distance}{Speed}=\frac{225}{60}=3\frac{3}{4}hr$
Answer (C) $3\frac{3}{4}hr$