Sangeeta and Swati bought two wristwatches from Jamshedpur Electronics at 11.40 A.M. IST. After purchasing they found that when 60 minutes elapses on a correct clock (IST), Sangeeta’s wristwatch registers 62 minutes whereas Swati’s wristwatch registers 56 minutes. Later in the day Sangeeta’s wristwatch reads 10 P.M., then the time on Swati’s wristwatch is:
Answer: B As per the data in the question when Sangeeta’s wrist-watch moves 62 minutes Swati’s wrist-watch moves only 56 minutes. When Sangeeta’s wrist-watch will move 620 minutes, Swati’s wrist-watch will moveonly 560 minutes. So there will be a difference of 60 minutes between the times shown by the wrist-watches of Sangeeta and Swati. If Sangeeta’s wrist-watch shows 10 p.m. Swati’s wrist watch will show 9 p.m.
Q. No. 14:
A train left station X at A hour B minutes. It reached station Y at B hour C minutes on the same day, after travelling C hours A minutes (clock shows time from 0 hours to 24 hours). Number of possible value(s) of A is
Answer: A A hours + C hours = B hours … (i) A, C and B cannot have values greater than or equal to 24 B minutes + A minutes = C minutes … (ii) Looking at the two equations, we get that no value of A satisfies both the equations. Hence, option A.