Question
‘A’ alone can do some work in 13 days. ‘B’ and
‘C’ together can do the same work in 18 days. If ‘B’ is half as efficient as ‘A’, then find the time taken by ‘C’ to complete the work alone.Solution
Let the total work be 234 units. {LCM (13 and 18)} So, efficiency of ‘A’ = (234/13) = 18 units/day So, efficiency of ‘B’ = (18 x 0.5) = 9 unit/day Efficiency of ‘B’ and ‘C’ together = (234/18) = 13 units/day So, efficiency of ‘C’ = 13 – 9 = 4 units/day So, time taken by ‘C’ to finish the work alone = (234/4) = 58.5 days
Which one of the following is associated with Aroma is rice ?
Cotton and pigeon pea are:
Which scientists proposed the model explaining muscle contraction mechanism in insect physiology?
According to Lindeman’s law how much energy is lost while transfer from one to next trophic level ?
During Hybridisation in plants ,The process of removal of stamens from a flower is called:
Tungro disease of rice is transmitted by which insect?
What nutritional disease in poultry results from a deficiency of Vitamin D?
How much premium will be provided for each 0.1% increase in recovery rate over and above 10.25%?
Which one of the following type of nozzle is suitable for application of contact type of herbicide on dense weedy patches?
Which among the following can be used to prevent post-harvest decay of melons, carrots, potatoes, citrus fruits and accepted as “certified organic” ...
