Mathematics/General Ability MCQs
Topic Notes: Mathematics/General Ability
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
261
A boat's speed in still water is 18 km/h and the stream speed is 3 km/h. How long does it take to travel 48 km upstream?
Answer:
3.2
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 18 - 3 = 15 km/h. 3. Time = Distance / Speed = 48 / 15 = 3.2 hours.
262
A boat's speed in still water is 13 km/h and the stream speed is 3 km/h. How long does it take to travel 230 km upstream?
Answer:
23.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 13 - 3 = 10 km/h. 3. Time = Distance / Speed = 230 / 10 = 23.0 hours.
263
A boat's speed in still water is 14 km/h and the stream speed is 6 km/h. How long does it take to travel 88 km upstream?
Answer:
11.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 6 = 8 km/h. 3. Time = Distance / Speed = 88 / 8 = 11.0 hours.
264
A boat's speed in still water is 17 km/h and the stream speed is 3 km/h. How long does it take to travel 46 km upstream?
Answer:
3.29
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 17 - 3 = 14 km/h. 3. Time = Distance / Speed = 46 / 14 = 3.29 hours.
265
A boat's speed in still water is 14 km/h and the stream speed is 5 km/h. How long does it take to travel 200 km upstream?
Answer:
22.22
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 5 = 9 km/h. 3. Time = Distance / Speed = 200 / 9 = 22.22 hours.
266
A boat's speed in still water is 14 km/h and the stream speed is 5 km/h. How long does it take to travel 72 km upstream?
Answer:
8.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 5 = 9 km/h. 3. Time = Distance / Speed = 72 / 9 = 8.0 hours.