The average age of boys in the class is twice the number of girls in the class. If the ratio of the boys and girls in the class of 36 be 5:1, what is the total age of the boys in the class. A. 420 years B. 196 years C. 490 years D. 360 years

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