A train covers a distance in 50 minutes, if it runs at a speed of 48kmph on an average. The speed at which the train must run to reduce the time of journey to 40 minutes will be: A. 60 km/h B. 55 km/h C. 40 km/h D. 70 km/h

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