A certain amount of money earns ₹ 540 as simple interest in 3 years. If it earns compound interest of ₹ 376.20 at the same rate of interest in 2 years, find the principal (in Rupees). 

The average of five terms is 40. If the first four terms are given as 50, 52, 35 and 46, find the fifth term.

Answer the following questions

Nirmal started a business by investing Rs.48000. After 7 months, Vidya joined him with a capital of Rs.56000. At the end of the year of the total profit was Rs.5885. What is the Vidya’s share of the profit?

The average of marks scored by the students of a class is 68. The average of marks of the girls in the class is 80 and that of the boys is 60. What is the percentage of boys in the class? 

The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream?

Kuldeep sells an article for ₹ 3240 and earns a profit of 20%. What is the cost price of the article?

Bhuvnesh has drawn an angle of measure 45⁰7’ when he was asked to draw an angle of 45⁰. The percentage error in his drawing is 

The in-radius of an equilateral triangle is of length 3 cm. Then the length of each of its medians is