X leaves his house facing west, drives 100 km, then turns right and drives 100 km. He then turns left and drives 50 km. In which direction is X facing in relation to his starting point?
The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?