Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

ICSE Class 6 Answered

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 | 19 Feb, 2019, 04:56: PM
answered-by-expert 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 | 20 Feb, 2019, 12:35: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
ICSE 6 - Maths
81 prime fact 
Asked by misbhaul545 | 20 Oct, 2023, 06:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 6 - Maths
Find the lcm of12 13 and 76
Asked by anuprasad1991 | 22 Oct, 2019, 02:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
ICSE 6 - Maths
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 | 19 Feb, 2019, 04:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×