Question

If A and B are two supplementary angles and A is five times of B, then find the value of (A - B).
1. 120
2. 100
3. 110
4. 105

Answer 1

Correct Answer - Option 1 : 120

Given:

A and B are two supplementary angles

A = 5B

Concept used:

Supplementary angles are those whose sum is 180° 

Calculation:

A + B = 180

⇒ 5B + B = 180

⇒ 6B = 180

⇒ B = 30

So, A = 5B

⇒ A = 150

So, A - B

⇒ 150 - 30

⇒ 120

∴ required value is 120