a lorry left town A for town B 5/4hrs before a car . the lorry and the car are traveling in the same direction at 80 km/hr and 120 km /hr respectively .after the over take the car moved for another 199/800 hrs before reaching town B. calculate:the time the car took before overtaking the lorry and the distance of two towns​

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?