Geetha reaches her office 15 minutes late by walking at 4 km/h from her house. The next day, she increases her speed by 2 km/h and reaches on time. What is the distance from her house to the office (in km)?

Ramesh covers 56 part of the total distance by bus and the remaining 36 km by car. What is the total distance of his journey?

A person covers a distance of L km in 12 hours. If he increases his speed by 10 m/s, he covers the same distance in 8 hours. Which of the following statements is/are correct? I. The value of L is 760 km. II. The original speed of the person is 72 km/h.