A man is 7 years older than his wife and the wife is now thrice as old as their daughter, who is 11 years old. How old was the man when his daughter was born?
A shopkeeper mixes two variants of wheat in the ratio 3:1. The first variant costs 24 per kg, while the other costs 16 per kg. If the mixed wheat is sold at the price of 15.4 per kg then find the profit/loss percent incurred by shopkeeper.
The graph shows the temperature forecast and the actual temperature of a city for ten days. Find the maximum deviation of actual temperature from the forecast.
Raghav deposited Rials1200 in bank on 8th February 1999 and withdrew on 8th November 1999. Find the interest earned by him at simple interest of 4% pa.