AP Police Constable practice question
A car runs for one hour with a speed 60 km per hour, for 2 hours with a speed 70 km per hour and for 5 hours with a speed 50 km per hour. What is the average speed of the car in km per hour?
From a AP Police Constable Science practice set · Science
Tap an option to check your answer.
Show answer and explanation
Correct answer: (A) 56.25
Total distance = (60x1) + (70x2) + (50x5) = 60 + 140 + 250 = 450 km, and total time = 1 + 2 + 5 = 8 hours. Average speed = 450/8 = 56.25 km/hr.
हिंदी में प्रश्न
एक कार एक घंटे तक 60 kmph की चाल से चलती है, 2 घंटे तक 70 kmph की चाल से चलती है और 5 घंटे तक 50 kmph की चाल से चलती है। कार की औसत चाल (kmph में) कितनी होगी?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (A) 56.25
कुल दूरी = (60x1) + (70x2) + (50x5) = 60 + 140 + 250 = 450 किमी, तथा कुल समय = 1 + 2 + 5 = 8 घंटे। औसत चाल = 450/8 = 56.25 किमी/घंटा।
More solved Science questions
- The characteristic color of Marine Algae depends on the pigments located in the plastids. Which pigment leads to 'Green' colour of the…
- Which of the following is present in a plant cell but absent in an animal cell?
- An electric heater rated 2 kW is used for 3 hours a day for 30 days. How many units (kWh) of electricity does it consume?
- A uniform wire of resistance 5 ohm is stretched uniformly so that its length becomes double. Its new resistance will be
- What will be the focal length of a convex lens with the power of a +2.5 Diopter?
- The present age ratio of the mother to the daughter is 7: 2. After 12 years, their ages will be in the ratio of 9: 4. What is the current…