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Q.

If two complementary angles are in the ratio 1 : 4, then a correct statement is

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a

the greatest angle is 72°

b

The least angle is 18°

c

The greatest angle is 80°

d

The least angle is 20°

answer is B, C.

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Detailed Solution

The ratio of complementary angles =1:4

The sum of the parts in the ratio =1+4=5

The least angle =90°×15=18°

The greatest angle =90°×45=72°

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