. Two trains running in opposite directions
cross a man standing on the platform in
54s and 34s respectively and they cross
each other in 46 s. Find the ratio of their
speeds.
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Answer:
Answer
Let ABCD and PQRS be two roads in lawn.
Then EFGH is the region common to both of roads.
∴ Area of two roads = Area ABCD + Area PQRS - Area EFGH
= (20 × 3) m
2
+ (10 × 3) m
2
- (3 × 3) m
2
= 60 m
2
+ 30 m
2
- 9 m
2
= 81 m
2
Hence the area of the cross roads is 81 m
2
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