1.

Amit and Sonu drives a car at the speed of 7.5 km/hr and 4 km/hr respectively from the same point. Amit drives towards the east and Sonu drives towards the north. What is the distance between them after 2 hours?1. 25 km2. 18 km3. 20 km4. 17 km5. 30 km

Answer» Correct Answer - Option 4 : 17 km

Formula Used : 

Speed = distance / time

Calculations:

Let the distance traveled by Sonu and Amit be DS and DA respectively.

D= ( speed × time )A = 7.5 × 2 = 15 km

D= ( speed × time )S = 4 × 2 = 8 km

On applying Pythagoras theorem

Distance between Amit and Sonu = √(15+ 82)

⇒ Distance between Amit and Sonu =  √(152 + 82)

⇒ Distance between Amit and Sonu = 17 km

∴ The distance between them after 2 hours is 17 km.



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