GATE AR 2026 Paper 1 — page 15

Questions 43–45 of 81. Imported answers require review unless explicitly marked reviewed.

A city’s population in 2025 is 1,75,000 and is expected to increase in the next three decades at a growth rate of 8.5% per decade. In 2055, the estimated per capita domestic water demand will be 175 litres per day. The total daily domestic water demand for the city in 2055 (in million litres per day) will be __________ (round off to two decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The section of a R.C.C. staircase flight is shown in the figure below. Each riser and tread of the staircase is 150 mm and 300 mm, respectively. The steps are supported by a 75 mm thick waist slab.

The width of the staircase is 1500 mm. The flight consists of 10 steps. Consider reinforcement to be 0.75% by volume of the total R.C.C. The density of steel is 7800 kg/m³. The amount of reinforcement required to construct the staircase flight (in kg) is __________ (rounded off to two decimal places).

Diagram for Architecture and Planning question 44

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A rectangular open concrete drain channel has base width of 3 m and flow depth of 1.5 m. The channel bed slope is 0.001. If the Manning’s roughness coefficient of concrete used in this channel is 0.018, then the average flow velocity of this channel (in m/s) is __________ (rounded off to two decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

2026 · Paper 1

Question 43

Question 44

Question 45