Ee2403
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This document discusses cardinal directions and using directions to solve word problems. It provides definitions and examples of the four main directions (North, South, East, West) and four diagonal directions. It then presents four types of word problems involving directions and distances traveled, and provides the solutions. The problems can be solved by considering which direction the sun rises and sets and how that impacts shadows, and keeping track of turns made and directions faced.
Ee2403
- 1. EE2403: Comprehension Directions: Introduction: There are four main directions - East, West, North and South as shown below: There are four cardinal directions - North-East (N-E), North-West (N-W), South-East (S-E), and South- West (S-W) as shown below: 1. At the time of sunrise if a man stands facing the east, his shadow will be towards west. 2. At the time of sunset the shadow of an object is always in the east. 3. If a man stands facing the North, at the time of sunrise his shadow will be towards his left and at the time of sunset it will be towards his right. 4. At 12:00 noon, the rays of the sun are vertically downward hence there will be no shadow. Main types of questions are given below: Type 1: Siva starting from his house, goes 5 km in the East, then he turns to his left and goes 4 km. Finally he turns to his left and goes 5 km. Now how far is he from his house and in what direction? Solution: From third position it is clear he is 4 km from his house and is in North direction. Type 2: Suresh starting from his house, goes 4 km in the East, then he turns to his right and goes 3 km. What minimum distance will be covered by him to come back to his house? Solution:
- 2. Type 3: One morning after sunrise Juhi while going to school met Lalli at Boring road crossing. Lalli's shadow was exactly to the right of Juhi. If they were face to face, which direction was Juhi facing? Solution: In the morning sunrises in the east. So in morning the shadow falls towards the west. Now Lalli's shadow falls to the right of the Juhi. Hence Juhi is facing South. Type 4: Hema starting from her house walked 5 km to reach the crossing of Palace. In which direction she was going, a road opposite to this direction goes to Hospital. The road to the right goes to station. If the road which goes to station is just opposite to the road which IT-Park, then in which direction to Hema is the road which goes to IT-Park? Solution: From II it is clear that the road which goes to IT-Park is left to Hema.