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The correct answer is D
Six years ago, the age ratio of A to B was 5:6. In nine years, their age ratio will become 8:9. Determine the difference between their current ages.
A is younger than B by 4 years. If the ratio of A and B ages is 9:10 respectively, then find the age of A.
Present age of ‘D’ is 45% more than that of ‘E’. 9 years ago, ‘D’ was 1.75 times as old as ‘E’. Find the present age of ‘E’.
...The edge length of a regular tetrahedron is 10 cm. What is its volume?