The length of the two sides forming the right angle of a right-angled triangle are 6 cm and 8 cm, then find the length of its circum radius:

Pranav rows upstream a distance of 56km in 8 hours and rows downstream a distance of 75 km in 3 hours. How much time he will take to row a distance of 44.8 km in still water?

1-[5-{2+(-5+6-2)2}] is equal to 

If the angle of the elevation of sun is θ and the length of the shadow of a pole of length P is S, then 

129 meter from the foot of a cliff on level of ground, the angle of elevation of the top of cliff is 30 °. The height of this cliff is 

0.08% of 120% of 40,000 is equal to___.

Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is: 

AD is the median of a triangle ABC and O is the centroid such that AO = 10 cm. The length of OD (in cm) is