Book Maths Puzzle Numerical Ability Averages

A man goes to his office 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, what is the distance between his house and office?

Read Solution (Total 1)

avg speed =2(3)(2)/(3+2)= 12/5 kmph
d=(12/5)*(5)=12km
10 years agoHelpfull: Yes(1) No(2)

Book Other Question

A man rides his bicycle 10 km at an average speed of 12 km/hr and again travels 12 km at an average speed of 10 km/hr. What is his average speed for the entire trip approximately? In covering a distance of 30 km, Arun takes 2 hours more than Anil. If Arun doubles his speed, then he would take 1 hour less than Anil. What is Arun's speed?