Mahesh borrowed a certain sum for two years at simple interest from Bhim. Mahesh lent his sum to Vishnu at the same rate for two years compound interest. At the end of two years, Mahesh received Rs. 410 as compound interest but paid Rs. 400 as simple interest. Find the sum and rate of interest.

Give chapter 5 lines and angles own questions for board exams 

Find the following percentage value:

1) 15% of 250.

Find the angle which is equal to its supplement.

Find the breadth of the rectangle whose length is 70 cm and perimeter 200 cm.

Convert 1 gallon into liters.

a. 3.05 liters

b. 3.78 liters

c. 4.05 liters

d. 4.78 liters