GATE IN 2024 | GA | Question: 3

Question

​​​A student was supposed to multiply a positive real number $p$ with another positive real number $q$. Instead, the student divided $p$ by $q$. If the percentage error in the student's answer is $80 \%$, the value of $q$ is

• A. $5$
• B. $\sqrt{2}$
• C. $2$
• D. $\sqrt{5}$

Answer 1

Ans :- D

Hint : (pq - p/q) / pq = 0.8  After solving we get answer of q