Question : A journey takes 4 hours 30 minutes at a speed of 60 km/h. If the speed is 15 m/s, then the journey will take:

Option 1: 5 hours

Option 2: 5 hours 30 minutes

Option 3: 6 hours

Option 4: 6 hours 15 minutes

Question : Rahul alone can complete a work in 10 days and Sonu alone can complete the same work in 15 days. If they work together for 4 days, then what part of total work is left?

Option 1: $\frac{2}{3}$

Option 2: $\frac{1}{5}$

Option 3: $\frac{1}{3}$

Option 4: $\frac{2}{5}$

Question : If $a^3+b^3=9$ and $a+b=3$, then the value of $\frac{1}a+\frac{1}b$ is:

Option 1: $\frac{1}2$

Option 2: $\frac{3}2$

Option 3: $\frac{5}2$

Option 4:  $–1$

Question : If $X$ is 20% less than $Y$, then find the values of$\frac{Y–X}{Y}$ and $\frac{X}{X–Y}$.

Option 1: $\frac{1}{5}$ and $-4$

Option 2: $5$ and $-\frac{1}{4}$

Option 3: $\frac{2}{5}$ and $-\frac{5}{2}$

Option 4: $\frac{3}{5}$ and $-\frac{5}{3}$

Question : If $a^4+\frac{1}{a^4}=194$, then what is the value of $a^3+\frac{1}{a^3} ?$

Option 1: 44

Option 2: 52

Option 3: 48

Option 4: 50