.two places a and b are 750km apart from place a a car and a bus start at the same time towards b.the speed of the car is 15 km/h more than the speed of the bus.the bus travels 2/3rd part of the total distance with its initial speed after this it stops for 20min then its speed changes 4/5of its original speed and it travel the remaining distance with this speed. the car travel 1/3part of the total distance with its initial speed and after this it stops for 40min after this its speed reduced by 1/6of the original speed and travels the remaining distance with this speed.if the car reaches 1 1/18) hours earlier than b.then find the initial speeds of the car and the bus.and also find if the bus starts at 10am then at what time will it reach to b with solution