Selected MCQ

Current Question
If 5 machines produce 100 units in 4 hours, how many units will 10 machines produce in 2 hours?
  • A. 50
  • B. 100
  • C. 150
  • D. 200
Correct Answer: B
Explanation:
Work ∝ machines × time ⇒ same output.
Related Question 1
In a week, working hours are 8 per day. A man earns Rs. 2.40/hour and Rs. 3.20/hour for overtime. Total earnings were Rs. 432 in 4 weeks. How many hours worked?
  • A. 160
  • B. 175
  • C. 180
  • D. 195
Correct Answer: B
Explanation:
Solving the linear Equation gives 175 houRs.
Related Question 2
A student solves q questions in 1/h hour. How many questions in h hours?
  • A. hq
  • B. hq²
  • C. 1/hq
  • D. h/q
Correct Answer: B
Explanation:
Rate × time gives total.
Related Question 3
12 inches equals how many centimeters?
  • A. 30.48
  • B. 29
  • C. 34.12
  • D. 24
Correct Answer: A
Explanation:
1 inch = 2.54 cm.
Related Question 4
Pipes A, B, C fill tank in 12, 15, 20 houRs. If A alone works, time required is ____.
  • A. 6 hrs
  • B. 6⅔ hrs
  • C. 7 hrs
  • D. 7½ hrs
Correct Answer: C
Explanation:
Based on the given combination.
Related Question 5
Pipes A, B, C fill tank in 12, 15, 20 houRs. Find time together.
  • A. 6 hours
  • B. 6⅔ hours
  • C. 7 hours
  • D. 7½ hours
Correct Answer: C
Explanation:
Combined rate method.