Question

2. A rhombus shaped sheet of perimeter 40 cm and one diagonal 12 cm, is painted on both sides at the
rate of 5 per m2. Find the cost of painting,
1.1.6 Circumference and Area of a Circle
Circle : A circle is the collection of all those points in a plane, each of​

Answer 1

Answer:

$perimeter \: \\ = 4 \times a = 2 \sqrt{ {d.}^{2} + {d}^{2} } \\ 40 = 2 \sqrt{ {12}^{2} + {d}^{2} } \\ {20}^{2} - {12}^{2} = {d}^{2} \\ {d}^{2} = {16}^{2} \\ = > d \: = 16 \\ area \: = \frac{d \times d.}{2} = \frac{12 \times 16}{2} = 96 \\ \\ painted \: in \: both \: face \: \\ area = 2 \times 96 = 196m^{2} \\ cost \: of \: painting \: 1 {m}^{2} = 5 \: rupees \\ cost \: of \: painting \: 196 {m}^{2} = 196 \times 5 \\ = 960$

Answer 2

Step-by-step explanation:

can u plzzz give an explanation to me that how C = 15