Question
Working alone, B can complete the work in 30 days. C is
twice as efficient as B and A takes 3 days more than it takes C to complete the work. Working together, in how much time would they be able to complete 7 such works?Solution
Time taken by B to complete the work = 30 days Time taken by C to complete the work = 30/2 = 15 days Time taken by A to complete the work alone = 15 + 3 = 18 days Work done by A, B and C together in 1 day. ⇒ (1/30 + 1/15 + 1/18) = (3 + 6 + 5)/90 = 14/90 this means if would take 45/7 days for A, B and C to complete the work together ∴ Time taken A, B and C to complete 7 works = 7 × 45/7 days = 45 days
The door of Stevenson screen faces the direction
The lime loving plants are tolerant of high soil pH and are known as
Which disease is not associated with apple?
Which are of the following is an introduced quarantine weed in India?
The process of exposing transplant seedlings gradually to outdoor condition is termed as ……………
Which one of the following is the other parent to be crossed with Dee-Geo-woo-Gen to develop the semi-dwarf variety IR-8?
Which among the following is a major constraint in the rice–wheat system of Indo-Gangetic plains affecting long-term sustainability?
What is the main component of organic matter in soil?
The suitable seed rate of pearl millet to get seedling for transplanting in one hectare area
Transportation of potato tuber for seed purpose is not allowed from Darjeeling hills to North India due to the presence of
Relevant for Exams:
