Julia, Kavita and Priya walk around a circular track . They take 1/3 hours, 2/5 hours & 5/12 hours to complete a loop, respectively.
a) Find the sum of the time taken by each girl to complete a loop.
B) Express the time taken by each of them to complete a loop in minutes
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Answers
Answer:
Answer
7
Relative speed = (2 + 3) km/hr = 5 km/hr This means that A and B cross each other 5 times in a hour and at least 2 times in half an hour
∴ They cross each other 7 times before 9:30 a.m.
Step-by-step explanation:
Explanation:
Relative speed = Speed of A + Speed of B (because they walk in opposite directions)
=
2
+
3
=
5
rounds per hour
Therefore, they cross each other
5
times in
1
hour and
2
times in
1
2
hour
Time duration from
8
a.m. to
9.30
a.m.
=
1.5
hour
Hence they cross each other
7
times before
9.30
a.m.
hope that's help you!!
Answer:
a) Soln- 1/3 + 2/5 + 5/12
LCM of 3, 5 and 12=60
1/3= 1x20/3x20=20/60
2/5= 2x12/5x12=24/60
5/12= 5x5/12x5=25/60
20 + 24 + 25/60
69/60
1 9/60
b) Soln:- 1 hour= 60 minutes
60/1 x 69/60= 69 minutes
HOPE ITS CORRECT MATE☺