Question
The edge length of a regular tetrahedron is 10 cm. What
is its volume?Solution
Volume of a regular tetrahedron = (√2/12) * a³ = (√2/12) * 10³ ≈ 118 cm³. Answer: (A
Present age of ‘R’ is 75% more than that of ‘S’. 5 years ago, ‘R’ was 2.5 times as old as ‘S’. What is the present age of ‘S’?
...Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
10 years ago from now, ratio of ages of ‘R’ and ‘L’ was 3:8, respectively. If ‘L’ is 7 years elder to ‘R’, then what will be the age of ...
Three years ago, the ratio of ages of P, Q, and R was 4:3:5. Present age of S is 40 years, who is 5 years older than R. Find the age of P five years fro...
Present age of ‘A’ is 40% more than that of ‘B’. If 25 years hence from now, ‘B’ will be 15 years younger than ‘A’, then find the sum of...
The present age of Priya’s father is five years more than four times Priya's present age. If Priya's mother is nine years younger than her father and ...
Six years from now, Kirti's age will be twice that of her brother Kunal, but 4 years ago she was three times as old as Kunal was then. Find the present ...
Six years ago, the ratio of the ages of 'A' and 'B' was 3:5, respectively. However, eight years from now, the ratio of their ages will be 5:6. Determine...
When 18 years is subtracted from the present age of A and the obtained result is divided by 3, then the present age of his nephew is obtained. If the pr...
Ratio of present ages of A and B is 6:7, respectively. C who is 4 years older than A will become 40 years older after 12 years. Find the present age of B.
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