Question

questions.
1.
Amit's house is 1.2 km away from Reghu's house and 0.5 km away from Nishal's
house. Reghu takes 12 minutes to reach Amit's house and Amit takes 9 minutes to
reach Nishal's house. Who walks faster-Reghu or Amit?​

Answer 1

Explanation:

Suppose Amit starts travelling from origin.

He travels 2 km South, then 1 km West, then 5 km North and finally 5 km East.

So, he makes a right angle triangle ABC from origin with base BC =3 km and side AB =4 km.

∴ by Pythagoras Theorem,

AB

2

+ BC

2

= AC

2

.

4

2

+3

2

= AC

2

∴ AC=5 km.

Hence, Amit is 5 km far from the starting point.