Question
Working alone, 'C' can complete a job in 30 days. 'D'
takes 20% less time than 'C' to finish the same job. Calculate the percentage of work done by 'C' and 'D' together in 4 days.Solution
ATQ, Time taken by 'D' alone: 0.8×30=24 days Total work: LCM of 24 and 30 = 120 units Efficiency of 'C': 120/30=4 units/day Efficiency of 'D': 120/24=5 units/day Combined efficiency of 'C' and 'D': 4+5=9 units/day Work done in 4 days: 9×4=36 units Percentage of total work done: (36/120)×100=30 Therefore, 'C' and 'D' together complete 30% of the work in 4 days.
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
2720.03 ÷ 79.98 x 39.9 = ? + 40.32
28.11 × 3.98 + 29.03 × 3.12 – 34.95 + 95.9 × 4.02 =?
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
The Average of P1, P2, and P3 is 60. Given that P1 is equal to 1/3rd of this average, what is the average value of P2 and P3?
30.22% of (79.9 x 6.01) + 69.97 =?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
194.95 + 3.98 × 64.99 - ? = (10.99 + 9.02)2
What approximate value should come in place of question mark (?) in the following equations?
39.9% of 1720 + 80.2% of 630 = 89.9% of 1280 + ?
7.898 × ? + 139.89` ` `-:` 14.23 = 4004.04 – 353.89
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