Question

What is the correct time between 4 and 5 pm when the minute hand be hour hand be at right angles?

• A. 4-10' and 4-40'
• B. $4-5\frac{1^{\prime }}{11}and4-38\frac{1^{\prime }}{11}$
• C. 4-05' and 4-38'
• D. $4-5\frac{5^{\prime }}{11}and4-38\frac{2^{\prime }}{11}$

Answer 1

The correct option is D $4-5\frac{5^{\prime }}{11}and4-38\frac{2^{\prime }}{11}$

5×1211=6011=55′115×1211=6011=55′11
∴∴ Correct time = 4−55114−5511
and 35×1211=42011=3821135×1211=42011=38211
∴∴ Correct time = 4.38211′