The traffic lights at three different road crossings change after every 48 sec, 72 sec and 108 sec, respectively. They all change simultaneously at 08:20:00 hours, when will they again change…
Question and options
The traffic lights at three different road crossings change after every 48 sec, 72 sec and 108 sec, respectively. They all change simultaneously at 08:20:00 hours, when will they again change simultaneously?
- 9:27:12 hours
- 8:27:12 hours
- 7:27:13 hours
- 11:00:12 hours
Answer and explanation
Correct answer: B - 8:27:12 hours
LCM(48,72,108) = 2^4*3^3 = 432 s = 7 min 12 s. 08:20:00 + 7:12 = 08:27:12.
Practice for these exams
-
JIPMAT
Related question papers
Related exam syllabi
More solved explanations in Arithmetic
- A father is three times as old as his son. Eight years ago, the father was five times as old as his son. What is the present age of the son ?
- A certain sum of money gets a simple interest of ₹ 1600 over a 2-year period. The same sum of money invested at the same rate of interest on a compound interest…
- An accurate clock shows 8 o’clock in the morning. Through how many degrees will the hour hand rotate when the clock shows 2 o’clock in the afternoon?
- If 50% of (x – y) is equal to 30% of (x + y), then what percent of x is the value of y ?
- 'A' started a business with investment of ₹5000. After 2 months, 'B' & 'C' joined with ₹2500 and ₹3500, respectively. If total annual profit was ₹4800, what was…