Question
Person ‘R’ can complete a task in 60 days, and
together with ‘S’, they can do it in 24 days. If ‘S’ worked alone for 18 days and then left, how many days will ‘R’ take to finish the remaining work?Solution
Let the total work = 120 units {L.C.M of 60 and 24}
Then, efficiency of ‘R’ = 120 ÷ 60 = 2 units/day
Combined efficiency of ‘R’ and ‘S’ = 120 ÷ 24 = 5 units/day
So, efficiency of ‘S’ = 5 – 2 = 3 units/day
So, work done by ‘S’ alone in 18 days = 3 × 18 = 54 units
Remaining work = 120 – 54 = 66 units
Time taken by 'R' alone to complete the remaining work = 66 ÷ 2 = 33 days
Whooping cough is also called as
Which hormone predominantly influences plant growth?
In Photography, which chemical used as a fixer.
Lymph attacks harmful ________ in the blood.
Which act was passed by the British government to increase their grip on power in India, allowing them to arrest individuals without trial?
Identify the substance that fills the space between a cell's membrane and its nucleus.
Which of the following diseases is caused by a bacteria named 'Pseudomonas Solanacearum'?
Which Gland of the Human body secretes Melatonin?
The maintenance of Human blood Pressure is an example of
Which organ is primarily affected by pneumonia?
