A boy goes to his school from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming. the distance between his house and school is : Select:  A) 4.5 km  B) 5.5 km  C) 6 km  D) 7 km  E) None
Sol.   Average speed = [2*3*2 / 3+2] km/hr = 12/5 km/hr.   Distance travelled = [12/5 * 5= 
<gadget id="calculator">12/5 * 5</gadget>
<output>12</output>
12 km.   ∴ Distance between house and school= [12/2= 
<gadget id="calculator">12/2</gadget>
<output>6</output>
6 km.   Answer 6 km
<result>C</result>
A boy goes to his school from his house at a speed of 3 km/hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming. the distance between his house and school is :