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
201
A boat's speed in still water is 15 km/h and the stream speed is 3 km/h. How long does it take to travel 106 km upstream?
Answer:
8.83
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 15 - 3 = 12 km/h. 3. Time = Distance / Speed = 106 / 12 = 8.83 hours.
202
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 64 km upstream?
Answer:
4.57
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 = 64 / 14 = 4.57 hours.
203
A boat's speed in still water is 13 km/h and the stream speed is 4 km/h. How long does it take to travel 182 km upstream?
Answer:
20.22
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 13 - 4 = 9 km/h. 3. Time = Distance / Speed = 182 / 9 = 20.22 hours.
204
A boat's speed in still water is 18 km/h and the stream speed is 6 km/h. How long does it take to travel 224 km upstream?
Answer:
18.67
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 18 - 6 = 12 km/h. 3. Time = Distance / Speed = 224 / 12 = 18.67 hours.
205
A boat's speed in still water is 16 km/h and the stream speed is 6 km/h. How long does it take to travel 156 km upstream?
Answer:
15.6
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 16 - 6 = 10 km/h. 3. Time = Distance / Speed = 156 / 10 = 15.6 hours.
206
A boat's speed in still water is 15 km/h and the stream speed is 3 km/h. How long does it take to travel 170 km upstream?
Answer:
14.17
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 15 - 3 = 12 km/h. 3. Time = Distance / Speed = 170 / 12 = 14.17 hours.
207
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 216 km upstream?
Answer:
27.0
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 = 216 / 8 = 27.0 hours.
208
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 180 km upstream?
Answer:
22.5
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 = 180 / 8 = 22.5 hours.
209
A boat's speed in still water is 13 km/h and the stream speed is 4 km/h. How long does it take to travel 54 km upstream?
Answer:
6.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 13 - 4 = 9 km/h. 3. Time = Distance / Speed = 54 / 9 = 6.0 hours.
210
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 206 km upstream?
Answer:
17.17
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 = 206 / 12 = 17.17 hours.