Question
Ravi, Sohan, and Mohan can complete a certain task
individually in 18 days, 24 days, and 30 days, respectively. They all started working together, but after 6 days, Ravi and Mohan left, leaving Sohan to finish the remaining work alone. Determine the total number of days required to complete the entire task under these conditions.Solution
ATQ,Let total work be 360 units. {LCM (18, 24, and 30)}Efficiency of ‘Ravi’ = (360/18) = 20 units/dayEfficiency of ‘Sohan’ = (360/24) = 15 units/dayEfficiency of ‘Mohan’ = (360/30) = 12 units/dayWork completed in 6 days = {(20 + 15 + 12) × 6} = 282 unitsWork remaining = 360 – 282 = 78 unitsSo, time taken by ‘Sohan’ alone to complete the remaining work = {(360 – 282)/15} = 5.2 daysTherefore, total time taken to complete the work = (6 + 5.2) = 11.2 days
70.008% of 399.98 + ?% of 399.999 = 80.105% of 599.998
(278% of 695) ÷ 543 =?
A certain sum of money invested at R% p.a. fetches a compound interest (compounded annually) of 1620 and simple interest of Rs.1500 at the end of 2 year...
- 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.)
(11.99)2 + 171.16 + (3.33) 2 = ?2Â
(21.02%  of 600.15 ) × 14.95 = ? 2 + 29.99 × 3456 ÷ 1152
20% of 80 × 26% of 65 = ?
(0.89 3 + 1.64 3 +2.76 3 ) ÷ 5.89 = ?
- 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 approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
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