Question

Find 2 numbers such that their mean proportional is 25 and their third proportional is 25.

• A. 5 and 5
• B. 5 and 25
• C. 25 and 125
• D. 25 and 25

Answer 1

Answer:

D. 25 and 25

Solution: Formula used: If a , b and c are in proportion then we can say b2 = ac Calculation: Among the given options the mean proportional of 25 and 25 is ⇒ √25 × 25 = 25 The third proportional of 25 and 25 is ⇒ 25 × 25 / 25 = 25 ∴ The correct option is 4