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
181
A boat's speed in still water is 15 km/h and the stream speed is 6 km/h. How long does it take to travel 218 km upstream?
Answer:
24.22
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 15 - 6 = 9 km/h. 3. Time = Distance / Speed = 218 / 9 = 24.22 hours.
182
A boat's speed in still water is 19 km/h and the stream speed is 6 km/h. How long does it take to travel 226 km upstream?
Answer:
17.38
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 19 - 6 = 13 km/h. 3. Time = Distance / Speed = 226 / 13 = 17.38 hours.
183
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 190 km upstream?
Answer:
14.62
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 = 190 / 13 = 14.62 hours.
184
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 234 km upstream?
Answer:
19.5
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 = 234 / 12 = 19.5 hours.
185
A boat's speed in still water is 15 km/h and the stream speed is 5 km/h. How long does it take to travel 202 km upstream?
Answer:
20.2
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 15 - 5 = 10 km/h. 3. Time = Distance / Speed = 202 / 10 = 20.2 hours.
186
A boat's speed in still water is 15 km/h and the stream speed is 6 km/h. How long does it take to travel 154 km upstream?
Answer:
17.11
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 15 - 6 = 9 km/h. 3. Time = Distance / Speed = 154 / 9 = 17.11 hours.
187
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 134 km upstream?
Answer:
16.75
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 = 134 / 8 = 16.75 hours.
188
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 148 km upstream?
Answer:
24.67
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 = 148 / 6 = 24.67 hours.
189
A boat's speed in still water is 17 km/h and the stream speed is 6 km/h. How long does it take to travel 158 km upstream?
Answer:
14.36
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 17 - 6 = 11 km/h. 3. Time = Distance / Speed = 158 / 11 = 14.36 hours.
190
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 124 km upstream?
Answer:
10.33
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 = 124 / 12 = 10.33 hours.