Question
Solution
Time taken by A to complete 100% work = 4 × 5 = 20 days Time taken by B to complete 100% work = 10 × 3 = 30 days L.C.M of 20 and 30 = 60 = Total work Efficiency of A = 60/20 = 3 units/day Efficiency of B = 60/30 = 2 units/day Worked done by A and B together in 9 days = (3 + 2) × 9 ⇒ 45 units Remaining work = (60 – 45) units ⇒ 15 units C can complete the remaining work in 6 days Efficiency of C = 15/6 = 2.5 units/day Total efficiency of B and C = (2 + 2.5) units/day ⇒ 4.5 units/day Now, 75% of total work = 75% of 60 units ⇒ 45 units Required time = 45/4.5 days ⇒ 10 days ∴ B and C can complete 75% work in 10 days
Which of the following is NOT a full-time member of the reconstituted NITI Aayog?
Which summit did India and Canada’s renewed economic engagement stem from, involving their Prime Ministers?
Jammu & Kashmir has become the first Union Territory to integrate with the NSWS. What is the acronym of first ‘S’ in NSWS?
Which district has been recognized as the top-performing district under the Jal Jeevan Survekshan (JJS-2023) for successfully implementing the Jal Jeeva...
People like small farmers and seasonal workers who regularly move in and out of poverty are categorised as ________.
The partnership between NITI Aayog and UNICEF aims to improve maternal and child nutrition through which initiative platform?
The Namma 112 AI system supports how many additional languages beyond existing ones?
What is the main vector responsible for malaria transmission?
What major announcement was made regarding the CISF?
How many initial projects were launched under the India–UN Global Capacity Building Initiative?
Relevant for Exams:
