CLEAR
Toprankers-Info

+91 7676564400

Mobile App

Get it on Google Play
Discussions
Select Date
Tags:

Articles

Discussions
Submit Discussion
Anupama ks

· started a discussion

· 1 Months ago

No of times the process had been taken place (Question:181740.0)

Process repeated 3 times means the process for the first time and it's three repetition. If so the answer will be fourty plus something.

Question:
From a container, full of pure milk, 20% is replaced by water and this process is repeated two more times. At the end of the third operation, the quantity of pure milk reduces.
Options:
A) 40.0%
B) 50.0%
C) 51.2%
D) 58.8%
Solution:

Let the initial quantity of pure milk in the vessel be 100 liters. Remaining milk after n operations =


Initial quantity of milk\(\times \left ( 1-\cfrac {y}{x} \right )^n\) 

Here, n = 3 

\(\therefore\) quantity of milk remained

= 100 \(\times \left ( 1-\cfrac {20}{100} \right )^3=100\left ( \cfrac {4}{5} \right )^3\)  

=100 \(\times \cfrac{4}{5}\times \cfrac{4}{5}\times \cfrac{4}{5}=51.2\)

or 51.2%

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Given answer is correct.
Keep learning,
Team TR
-logo
We at aim to provide most comprehensive content & test for practice which is carefully divided into various chapters and topics to help you focus on your weak areas.Our Practice mock test gives you unmatched analytics to help you realize your strong areas,time management and improvement areas.Our Short & Crisp notes on each topic will help you to quickly revise the topic along with the tips & tricks of the exams.
More About
-Info
-Info

Mobile App

Get it on Google Play
About Us Campus Ambassador Careers Contact Us Refund Policy

All Rights Reserved Top Rankers

User Policy
Disclaimer
Terms & Conditions