Question

Need step by step explanation please

Answer 1

Answer:

baski h to karlo

Answer 2

$Given \: a \:and \: b \: are \: two \: angles$

$a + b = 180\degree \: --(1) \\\blue { ( Linear \:pair )}$

$\implies b = 180\degree - a \: --(2)$

$2a - 3b = 60\degree \: --(3)$

/* Put (2) in equation (3) , we get */

$2a - 3( 180 - a ) = 60 \degree$

$\implies 2a - 540 + 3a = 60$

$\implies 5a = 60+540$

$\implies 5a = 600$

$\implies a = \frac{600}{5}$

$\implies a = 120\degree$

/* Put value of 'a' in equation (1), we get */

$b = 180 - 120$

$\implies b = 60\degree$

$\red { Value \: of \: 5b } \\= 5 \times 60 \\= 300 \degree$

Therefore.,

$Option \: \green { ( 2 ) } \: is \: correct.$

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