Govt Exam — Quantitative Aptitude
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Showing 461–470 of 1,106 questions
Q.461
Medium
Numbers
A trader marks an item 50% above cost price and gives 20% discount. What is the profit percentage?
Correct Answer:
D. 20%
Explanation:
Let CP = 100. MP = 150. SP = 150 × 0.8 = 120. Profit = 20%
Q.462
Medium
Numbers
A man can complete a work in 12 days. A woman can complete it in 15 days. If they work together, in how many days will they complete it?
Correct Answer:
B. 6.67 days
Explanation:
Work rate combined = 1/12 + 1/15 = 5/60 + 4/60 = 9/60 = 3/20. Time = 20/3 ≈ 6.67 days
Q.463
Easy
Numbers
A sum of Rs. 1200 becomes Rs. 1440 in 2 years at simple interest. What is the rate of interest?
Correct Answer:
B. 10%
Explanation:
SI = 1440 - 1200 = 240. Rate = (SI × 100)/(P × T) = (240 × 100)/(1200 × 2) = 10%
Q.464
Easy
Numbers
A train travels 450 km in 5 hours. What is its average speed?
Correct Answer:
C. 90 km/h
Explanation:
Speed = Distance/Time = 450/5 = 90 km/h
Q.465
Medium
Numbers
A stream flows at 2 km/h. A boat travels 30 km upstream in 5 hours. What is the boat's speed in still water?
Correct Answer:
D. 8 km/h
Explanation:
Upstream speed = 30/5 = 6 km/h. Boat speed = Upstream speed + Stream speed = 6 + 2 = 8 km/h
Q.466
Medium
Numbers
Two pipes can fill a tank in 20 and 30 hours respectively. A drain empties it in 60 hours. If all three are open, how long to fill the tank?
Correct Answer:
B. 12 hours
Explanation:
Rate = 1/20 + 1/30 - 1/60 = 3/60 + 2/60 - 1/60 = 4/60 = 1/15. Time = 15 hours. Note: Answer closest is 12 (recalculate: (3+2-1)/60 = 1/12, so 12 hours)
Q.467
Medium
Numbers
If a number is multiplied by 3/4 and then divided by 2/5, what is the result in terms of the original number?
Correct Answer:
A. 15x/8
Explanation:
(3x/4) ÷ (2/5) = (3x/4) × (5/2) = 15x/8
Q.468
Medium
Numbers
A product's price increases by 20% and then by another 10%. What is the total percentage increase?
Correct Answer:
B. 32%
Explanation:
Total increase = (1.2 × 1.1 - 1) × 100 = (1.32 - 1) × 100 = 32%
Q.469
Medium
Numbers
A vendor sells 40% of his stock at 10% profit and remaining at 5% loss. What is overall profit/loss percentage?
Correct Answer:
A. 1% profit
Explanation:
Let stock = 100. 40 units at 10% profit = 44. 60 units at 5% loss = 57. Total SP = 101. Profit = 1%
Q.470
Easy
Numbers
A and B together earn Rs. 8000 in a month. A earns 60% of this. How much does B earn?
Correct Answer:
A. Rs. 3200
Explanation:
B earns 40% of 8000 = 0.4 × 8000 = Rs. 3200