Question
‘A’ and ‘B’ can do a piece of work in 20 days
and 32 days, respectively. If they started the work together and worked on it for 9 days, then find the time taken by ‘B’ alone to complete the remaining work.Solution
Let total amount of work be 160 units Efficiency of ‘A’ = 160/20 = 8 units/day Efficiency of ‘B’ = 160/32 = 5 units/day Amount of work done by ‘A’ and ‘B’ together in 9 days = (8 + 5) × 9 = 117 units Time taken by B to complete remaining work = (160 – 117)/5 = 8.6 days
More Time and work Questions
63.89% of 549.68 – (739.87 ÷ 5.34) = ? × 11.89Â
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 + ?
416.021 ÷ 3.782 + 13.012 × 24.987 =?
...888.191 + 2.0001 X 7.961= ?
6940 ÷ 28 ÷ 7 =?
16(17/23)Â + 11(15/46)Â - 15(17/25) =? - 19(13/23)
32.12% of 2399.98 + 64.04% of 2499.95 = ? × 15.95
- 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.)
(67.2)2 – (8.9)2 – (22.02)2 =?
8 × 1099.95 ÷ 20.03 + 187.95 = ? × 3.96
