.png)
Mobiprep has created step by step solution to estimation questions for all product management and consulting interview questions to help you with the mastering placement interviews. So let’s get started with the estimation questions.
Our team has curated a list of the most important product management frameworks asked in interviews such as Google, Deloitte, McKinsey, Microsoft, EY, ZS and many more. The frameworks are created from the best practices adopted by previous year candidates.
In this estimation question we have analysed the market size of the number of Golf ball that can fit in the room. Check out the step-by-step answer created by Mobiprep experts.
Estimation Question Step-1: Segmentation
Approach:
Assume the room to be approximately 4 mtrs wide, 6 mtrs long and 4 mtrs in height.
(I came to this number as I know my height is 1.67 mtrs. So, I imagined how many people of my height can lie along the edge of the room.)
Therefore, Volume of the room = 400*400*600 cubic cm
= 4*4*6*10^6 cubic cm
= 96*10^6 cubic cm
Average diameter of a Golf ball is say 5 cm.
Therefore, volume of the Golf ball = 4/3*3.14*5/2*5/2*5/2 (As, Vol. of sphere = 4/3*3.14*r^3)
= 65.41 cubic cm
Now, volume covered by a Golf ball, if a cube of volume a^3 packs one Golf ball.
So, Volume of Golf ball = Volume of a cube
Therefore, 4/3*3.14*(5/2)^3 = a^3
Hence, a = 4 cm (approx)
Therefore, Volume of cube = 4*4*4 cubic cm
= 64 cubic cm
Now,
For total no. of Golf balls that can fit in the room = (Volume of the room/Volume of the cube)
= (4*4*6*10^6)/(4*4*4)
= 1.5*10^6 balls
Estimation Question Step-2: Solution
Now, for the spaces left in the 4 edges of the cube is approximately 25% volume of the ball.
Therefore, total number of Golf balls that can fit in the room are (1.5*10^6 - 25%*1.5*10^6)
balls
So, total Golf will be 3/4*15 lakhs
Therefore, total number of Golf balls that can fit in the room = 11.25 lakhs or 11 lakhs 25 thousands.