The frustum shaped outer portion of the table lamp has to be painted including the top part. Calculate the total cost of painting the lamp if the cost of painting \(1\) sq.m is \(₹2\).
| 2 \(cm\) | ||
| 4 \(cm\) |  |
|
| 5 \(cm\) | ||
Answer:
Slant height of the frustum \(=\) \(m\).
Area to be painted is given by sq. units
Area to be painted \(=\) \(m^2\)
The cost of painting the frustum part of the lamp is \(₹\) .
[Note: Enter your answer rounded off up to two decimal places]