Question
X and Y alone can complete a work in 10 and 40 days,
respectively. 50% of the work is completed by Z in 20t days, and the remaining work is completed by X and Y working together in ‘t’ days. Find the time taken by Y and Z to complete the whole work while working together.Solution
Time taken by X and Y to complete the whole work while working together = (10 × 40)/(10 + 40) = 8 days So, t = 8/2 = 4 (Since, 50% of the work is done by X and Y together) As, time taken by Z to complete 50% of the work = 4 × 20 = 80 days So, time taken by Z to complete the entire work = 80 × 2 = 160 days Therefore, time taken by Y and Z to complete the whole work while working together = (160 × 40)/(160 + 40) = 32 days
What approximate value should replace the question mark?
12.45% of 640.20 − 60% of 2500 = ? − 9000.10
`[(7.99)^2 - (13.001)^2 + (4.01)^3]^2=` ?
- 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.)
What value should come in place of question mark (?) in the following question. (You need not to calcualte the exact value)
?/647 = 226/ ?
- 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.)
A, B & C have Rs.1550 together. If they divide the money in the ratio 1:3:1 respectively. Find the difference of amount received by B and C.
What approximate value should come in the place of (?) in the following questions?
∛(92.8 + √1025) * ? = 16.06% of 750
√1024.21 × √624.89 ÷ 4.98 + 11.99 × 4.01 = ?
√784 × 3 + (713.99 ÷ 6.98) = ?% of 619.99
11.11% of (123.45 + 234.56) + 10.01³ - (5.05 of 7.07) = ? of (88.88 - 33.33)
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