a man travels from his house ti his office at 5 km/hr and reaches his office 20 min late .if his speed had been 7.5 km/hr ,he would have reached his office 12 min early .find the distance from his house to his office.
A is driving along a highway at a speed of 90 km/hr .He is passed by B who is driving on the same highway in the same direction at a constant speed .Twelve seconds after B passes A ,their cars are 100 m apart.The speed of B's car ,in km/hr,is
Points A and B are 90 km apart from each other on a highway. A car starts from A and another from B at the same time. If they go in the same direction they meet in 9 hours and if they go in opposite directions they meet in 9/7 hours. Find their sppeds.
Students attend our lectures, not because the mathematics we teach ‘makes lots of fun’ for us, but because they believe they can learn some essential knowledge from us. And each of our young students has only one life to live. We should therefore be a
H. Behnke
Arithmetic is numbers you squeeze from your head to your hand to your pencil to your paper till you get the answer