Question

Pranali and Prasad started walking to the East and to the North respectively,
from the same point and at the same speed. After 2 hours distance between them
was 15 km. Find their speed per hour.
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Answer 1

Answer:

speed = distance/time

Pranjali and prasad started started walking at same time in east and north that is perpendicular to each other. making 90 degrees angle.

 

       after two hours distance covered in east =  2hours * x km

                                                                in north = 2 hours * x km

    as they make a right angled triangle ,

        15² = (2x)²+(2x)²

        225= 4x²+4x²

        225= 8x²

        225/8=x²

         x=5.30 km

5.30 km in two hours

speed = 2.65 km per hour

Step-by-step explanation: