Challenger App

No.1 PSC Learning App

1M+ Downloads
The mean proportional between 36 and 121 is equal to:

A72

B85

C66

D52

Answer:

C. 66

Read Explanation:

mean proportional between a and b = √(ab) = √(36 × 121) = 6 × 11 = 66


Related Questions:

A, B and C invested capital in the ratio 5 : 7 : 4, the timing of their investments being in the ratio x : y : z. If their profits are distributed in the ratio 45 : 42 : 28, then x : y : z = ?
A vessel contains liquids P and Q in the ratio 5 : 3. If 16 L of the mixture is removed and replaced by same quantity of liquid Q and the ratio becomes 3:5 What is the quantity that the vessel hold ?
Rs 3200 is divided among A, B and C in the ratio of 3 : 5 : 8 respectively. What is the difference (in Rs) between the share of B and C?
Lalit and Manoj started a business in partnership investing ₹10,000 and ₹18,000, respectively. After eight months, Nitin joined them by investing ₹24,000. What will be the total share of Nitin and Manoj in the total profit of ₹22,000 earned at the end of 2 years from the starting of the business?
Two trains in opposite direction take 20 sec and 30 sec to pass an electric post if both of the train take 23 sec to pass one another what is the ratio of speed of train ?