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The movement of air (sometimes called turbulence) in the atmosphere of Earth causes a series of refractions which makes the starlight to get slightly bent as it travels from the distant star through the atmosphere down to us on the ground. This means that some of the light reaches us directly and some gets bent slightly away. To our eyes, this makes the star seem to twinkle.
A does 2/5 of a work in 9 days. Then B joined him and they together completed the remaining work in 6 days. B alone can finish the whole work in
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X can do a piece of work in 36 days. He worked at it for 6 days and then Y finished it in 20 days. In how many days can X and Y together finish the work...
X, Y and E can do piece of work in 24, 30 and 40 days respectively. All three began to work together but X and Y left 6 and 8 days respectively before c...
‘A’ can do a piece of work in 10 days. ‘B’ can do 80% of the same work in 20 days. If they work together for the entire time and get paid Rs.140...
Deepak and Deepti with each other can complete a work in 60 days, Deepti and Danny in 90 days and Deepak and Danny in 90 days. In how many days can De...
Akhil and Nikhil together can complete a work in 9 days while Nikhil alone takes 12 days to complete 50% of the work. If the efficiency of Sachin is 20%...
A and B together can complete a piece of work in 32 days while A alone can complete 40% of the work in 32 days. Find the time taken by B to compl...
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 to...
