- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Find the cost of polishing a circular table-top of diameter $1.6\ m$, if the rate of polishing is $₹\ 15\ m^2$. $(Take\ \pi=3.14)$
Given:
Diameter of the table top$=1.6\ m$.
The rate of polishing $= Rs.\ 15/m^2$
To do:
We have to find the cost of polishing the circular table top.
Solution:
Radius of the table top$=\frac{1.6}{2}\ m=0.8\ m$.
Area of the table top$=\pi (radius)^2$
$=3.14\times(0.8)^2$
$=3.14\times0.64$
$=2.0096\ m^2$
Therefore, Cost of polishing the table top$=Area\ of\ the\ table\ top\times\ Rate\ of\ polishing$ $=Rs.\ 2.0096 \times15$
$=Rs.\ 30.144$
The cost of polishing the table top is Rs. 30.144.
 Advertisements