For the following questions answer them individually
A man invested a sum of money at compound interest. It amounted to ₹12100 in two years and to ₹13310 in three years. The rate of interest per annum is:
Two trains each having a length of 160 meters moving in opposite direction crossed each other in 9 seconds. If one train crossed a 200-metre-long platform in 18 seconds,then the ratio of their speeds is:
A man goes to a place in the car at speed of 160 km/h and comes back at a lower speed. If the average speed is 64 km/h in total, then the return speed (in km/h) is:
With reference to the development of a country, which of the following countries is associated to the Gross National Happiness?