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
221
A boat's speed in still water is 13 km/h and the stream speed is 5 km/h. How long does it take to travel 198 km upstream?
Answer:
24.75
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 13 - 5 = 8 km/h. 3. Time = Distance / Speed = 198 / 8 = 24.75 hours.
222
A boat's speed in still water is 13 km/h and the stream speed is 6 km/h. How long does it take to travel 214 km upstream?
Answer:
30.57
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 13 - 6 = 7 km/h. 3. Time = Distance / Speed = 214 / 7 = 30.57 hours.
223
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 174 km upstream?
Answer:
12.43
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 = 174 / 14 = 12.43 hours.
224
A boat's speed in still water is 14 km/h and the stream speed is 4 km/h. How long does it take to travel 56 km upstream?
Answer:
5.6
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 4 = 10 km/h. 3. Time = Distance / Speed = 56 / 10 = 5.6 hours.
225
A boat's speed in still water is 14 km/h and the stream speed is 4 km/h. How long does it take to travel 184 km upstream?
Answer:
18.4
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 4 = 10 km/h. 3. Time = Distance / Speed = 184 / 10 = 18.4 hours.
226
A boat's speed in still water is 12 km/h and the stream speed is 6 km/h. How long does it take to travel 84 km upstream?
Answer:
14.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 12 - 6 = 6 km/h. 3. Time = Distance / Speed = 84 / 6 = 14.0 hours.
227
A boat's speed in still water is 19 km/h and the stream speed is 3 km/h. How long does it take to travel 50 km upstream?
Answer:
3.12
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 19 - 3 = 16 km/h. 3. Time = Distance / Speed = 50 / 16 = 3.12 hours.
228
A boat's speed in still water is 19 km/h and the stream speed is 4 km/h. How long does it take to travel 130 km upstream?
Answer:
8.67
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 19 - 4 = 15 km/h. 3. Time = Distance / Speed = 130 / 15 = 8.67 hours.
229
A boat's speed in still water is 16 km/h and the stream speed is 4 km/h. How long does it take to travel 188 km upstream?
Answer:
15.67
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 16 - 4 = 12 km/h. 3. Time = Distance / Speed = 188 / 12 = 15.67 hours.
230
A boat's speed in still water is 19 km/h and the stream speed is 5 km/h. How long does it take to travel 82 km upstream?
Answer:
5.86
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 19 - 5 = 14 km/h. 3. Time = Distance / Speed = 82 / 14 = 5.86 hours.