Major Competitive Exams
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Q. A river has a length of 150 km and a width of 50 m. If the average depth is 3 m, what is the approximate volume of water in the river in cubic meters?
Q. A river has a length of 150 km and a width of 50 m. What is the area of the river? (2020)
Q. A river has a length of 200 km and a width of 50 m. What is the area of the river's surface? (2021)
Q. A river has a width of 300 meters and a depth of 5 meters. What is the volume of water flowing through the river in one second if the flow speed is 2 m/s? (2020)
Q. A river has a width of 300 meters. If a boat crosses the river at a speed of 15 m/s, how long will it take to cross the river? (2020)
Q. A river is 150 km long and has an average width of 50 meters. What is the approximate area of the river?
Q. A river is 300 m wide. If a person swims across the river at a speed of 2 m/s and the river flows at 1 m/s, how long will it take to cross the river? (2020)
Q. A river is flowing at a rate of 1000 liters per second. How many cubic meters of water does it flow in one hour?
Q. A river meanders and has a total length of 150 km. If the straight-line distance from the source to the mouth is 100 km, what is the river's meandering ratio? (2023)
Q. A river's current is 5 km/h. If a boat travels downstream at 15 km/h, what is the effective speed of the boat relative to the riverbank?
Q. A river's depth increases by 2 meters due to rainfall. If the river's width is 50 meters, what is the increase in volume per kilometer of the river? (2020)
Q. A river's flow is measured at 50 m³/s. If the river narrows, causing the flow to increase to 75 m³/s, what is the percentage increase in flow?
Q. A river's flow rate is measured at 1500 liters per second. How many cubic meters of water does it flow in an hour? (2021)
Q. A river's flow rate is measured at 200 cubic meters per second. How much water flows through the river in one hour? (2020)
Q. A river's sediment load is measured at 200 kg per cubic meter of water. If the river has a flow of 100 m³/s, what is the sediment load per second? (2023)
Q. A river's sediment load is measured at 300 kg per cubic meter of water. If 1000 m³ of water flows, how much sediment is carried? (2019)
Q. A river's velocity is measured at 2 m/s. If the river's width is 10 m and depth is 3 m, what is the discharge?
Q. A river's width is 15 m and its average depth is 2 m. What is the cross-sectional area of the river?
Q. A river's width is 50 meters and its average depth is 3 meters. What is the cross-sectional area of the river? (2022)
Q. A roller coaster at the top of a hill has a height of 30 m. If it has a mass of 500 kg, what is its potential energy at the top?
Q. A roller coaster at the top of a hill has a height of 30 m. If it has a mass of 500 kg, what is its potential energy? (g = 9.8 m/s²)
Q. A roller coaster at the top of a hill has a potential energy of 5000 J. If it descends to a height of 10 m, what is its speed at the bottom? (g = 9.8 m/s²)
Q. A roller coaster starts from rest at a height of 30 m. What is its speed at the lowest point? (g = 9.8 m/s²)
Q. A roller coaster starts from rest at a height of 50 m. What is its speed at the lowest point? (g = 9.8 m/s²)
Q. A roller coaster starts from rest at a height of 50 m. What is its speed at the lowest point?
Q. A rolling object has a radius R and rolls with a speed v. What is its total kinetic energy?
Q. A rolling object has a total kinetic energy of K. If it is a solid sphere, what is the translational kinetic energy?
Q. A rolling object has both translational and rotational motion. Which of the following quantities remains constant for a rolling object on a flat surface?
Q. A rotating body has an angular momentum L. If its moment of inertia is doubled and angular velocity is halved, what will be the new angular momentum? (2021)
Q. A rotating body has an angular momentum L. If its moment of inertia is I, what is the angular velocity ω of the body?
