Question

Karan solves a question in 15 seconds. One of his friends challenges him that he can complete the work in one-fourth of the time that Karan takes. What is the time taken by Karan's friend to complete the work?

Answer 1

Time taken by Karan to solve a question= 15 seconds

As per the question,

Time taken by Karan's friend to solve the question
= $\frac{1}{4}$ of the time taken by Karan to solve the question
=15$\times \frac{1}{4}$
=$\frac{15\times 25}{4\times 25}$
= $\frac{375}{100}$
= 3.75 seconds

Hence, Karan's friend will take 3.75 seconds to solve the question.