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
171
A boat's speed in still water is 16 km/h and the stream speed is 5 km/h. How long does it take to travel 204 km upstream?
Answer:
18.55
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 16 - 5 = 11 km/h. 3. Time = Distance / Speed = 204 / 11 = 18.55 hours.
172
A boat's speed in still water is 14 km/h and the stream speed is 3 km/h. How long does it take to travel 104 km upstream?
Answer:
9.45
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 14 - 3 = 11 km/h. 3. Time = Distance / Speed = 104 / 11 = 9.45 hours.
173
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 136 km upstream?
Answer:
15.11
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 = 136 / 9 = 15.11 hours.
174
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 178 km upstream?
Answer:
11.12
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 = 178 / 16 = 11.12 hours.
175
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 38 km upstream?
Answer:
3.8
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 = 38 / 10 = 3.8 hours.
176
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 176 km upstream?
Answer:
11.73
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 = 176 / 15 = 11.73 hours.
177
A boat's speed in still water is 16 km/h and the stream speed is 5 km/h. How long does it take to travel 76 km upstream?
Answer:
6.91
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 16 - 5 = 11 km/h. 3. Time = Distance / Speed = 76 / 11 = 6.91 hours.
178
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 208 km upstream?
Answer:
16.0
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 = 208 / 13 = 16.0 hours.
179
A boat's speed in still water is 12 km/h and the stream speed is 5 km/h. How long does it take to travel 196 km upstream?
Answer:
28.0
Step-by-step solution: 1. Upstream effective speed = still water speed - stream speed. 2. Effective speed = 12 - 5 = 7 km/h. 3. Time = Distance / Speed = 196 / 7 = 28.0 hours.
180
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 94 km upstream?
Answer:
8.55
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 = 94 / 11 = 8.55 hours.