Selected MCQ

Current Question
A, B, and C together earn Rs. 150/day. A+B earn Rs. 94 and B+C earn Rs. 76. What is C’s earning?
  • A. Rs. 10
  • B. Rs. 15
  • C. Rs. 20
  • D. Rs. 25
Correct Answer: C
Explanation:
Solve the system of equations.
Related Question 1
Out of the earnings of Rs. 720, a person spends 65%. Savings are ____.
  • A. Rs. 350
  • B. Rs. 390
  • C. Rs. 252
  • D. Rs. 316
Correct Answer: C
Explanation:
Savings = 35% of 720 = 252.
Related Question 2
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 3
Pipes P, Q, R fill the tank in 20, 15, 12 minutes. Together fill in ____.
  • A. 5 min
  • B. 10 min
  • C. 15 min
  • D. 20 min
Correct Answer: A
Explanation:
Combined rate.
Related Question 4
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.
Related Question 5
Three pipes, A, B, and C, fill the tank in 30, 20, and 15 minutes, respectively. Together they fill in ____.
  • A. 5/11
  • B. 6/11
  • C. 7/11
  • D. 8/11
Correct Answer: B
Explanation:
Combined rate calculation.