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
191
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 70 km upstream?
Answer:
8.75
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 = 70 / 8 = 8.75 hours.
192
A boat's speed in still water is 18 km/h and the stream speed is 5 km/h. How long does it take to travel 144 km upstream?
Answer:
11.08
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 18 - 5 = 13 km/h. 3. Time = Distance / Speed = 144 / 13 = 11.08 hours.
193
A boat's speed in still water is 12 km/h and the stream speed is 4 km/h. How long does it take to travel 116 km upstream?
Answer:
14.5
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 12 - 4 = 8 km/h. 3. Time = Distance / Speed = 116 / 8 = 14.5 hours.
194
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 212 km upstream?
Answer:
35.33
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 = 212 / 6 = 35.33 hours.
195
A boat's speed in still water is 12 km/h and the stream speed is 3 km/h. How long does it take to travel 164 km upstream?
Answer:
18.22
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 12 - 3 = 9 km/h. 3. Time = Distance / Speed = 164 / 9 = 18.22 hours.
196
A boat's speed in still water is 17 km/h and the stream speed is 5 km/h. How long does it take to travel 142 km upstream?
Answer:
11.83
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 17 - 5 = 12 km/h. 3. Time = Distance / Speed = 142 / 12 = 11.83 hours.
197
A boat's speed in still water is 17 km/h and the stream speed is 4 km/h. How long does it take to travel 62 km upstream?
Answer:
4.77
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 17 - 4 = 13 km/h. 3. Time = Distance / Speed = 62 / 13 = 4.77 hours.
198
A boat's speed in still water is 12 km/h and the stream speed is 3 km/h. How long does it take to travel 228 km upstream?
Answer:
25.33
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 12 - 3 = 9 km/h. 3. Time = Distance / Speed = 228 / 9 = 25.33 hours.
199
A boat's speed in still water is 18 km/h and the stream speed is 4 km/h. How long does it take to travel 192 km upstream?
Answer:
13.71
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 18 - 4 = 14 km/h. 3. Time = Distance / Speed = 192 / 14 = 13.71 hours.
200
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 120 km upstream?
Answer:
12.0
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 = 120 / 10 = 12.0 hours.