The traffic light at 3 diffrent road crossing change after every 48 sec. 72sec.and 100sec.respectively. if they change simultaneously at 8 am,at what time will they change again simultaneously.
Asked by manjarirawat373
| 19th Feb, 2019,
04:56: PM
Expert Answer:
Prime factorisation of 48, 72 and 100.
48 = 2 × 2 × 2 × 2 × 3
72 = 2 × 2 × 2 × 3 × 3
100 = 2 × 2 × 5 × 5
LCM(48, 72, 100) = 3600
3600 seconds = 60 mins = 1 hour
Therefore at 8 + 1 = 9am they change again simultaneously.
Answered by Yasmeen Khan
| 20th Feb, 2019,
12:35: PM
Kindly Sign up for a personalised experience
- Ask Study Doubts
- Sample Papers
- Past Year Papers
- Textbook Solutions
Sign Up
Verify mobile number
Enter the OTP sent to your number
Change