He distance-time the graph shows class 8a’s journey to the zoo. they stopped for a picnic on the way to the zoo. (a)what time did the bus leave school? (b)what time did they stop for a picnic? (c)how far had they traveled when they stopped for a picnic? (d)how long did they stop for? (e)what time did they arrive at the zoo? (f)how far is the zoo from school?
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Explanation:
b'1. B is 100 km ahead of A.
2. speed of B =
PR
QR
=
2−0
150−100
=25Km/h
3. A will catch B at point Q after 2hrs and at a distance of 150Km.
4. speed of A=
OS
QS
=
2−0
150−0
=75Km/h
speed of B =25Km/h
so, the difference is 50Km/h
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