Estimation question

How would you estimate the total toll collected in one day across all the toll plazas in the country?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Tests structured estimation of a national infrastructure revenue figure using plaza count, traffic volume, and toll-rate assumptions.

State the goal: estimate total daily toll revenue across a country's toll plazas, assuming India given the context.
Estimate plaza count: assume roughly 800 national highway toll plazas.
Estimate daily vehicles per plaza: assume 15,000 vehicles per plaza per day on average, varying by highway density.
Estimate average toll per vehicle: assume a blended 60 rupees per crossing across cars, buses, and trucks.
Compute: 800 plazas times 15,000 vehicles times 60 rupees, about 720 million rupees a day, then sanity-check against known national figures.
Flag the simplification: real tolls vary sharply by vehicle class and highway, so treat this as directional.

States each assumption explicitly, plaza count, daily volume, average toll, before multiplying.
Uses a blended per-vehicle rate and explains why, instead of one flat number across all vehicle types.
Sanity-checks the result against publicly known national toll collection scale.
Flags variance by highway and vehicle class as a real limitation of the estimate.

Guessing a single national figure with no decomposition into plazas, volume, and rate.
Ignoring that trucks and buses pay significantly more than cars, skewing the average.

Chapters of the AI PM course that teach what this question tests.