It was 7 cm of rainfall on Sunday. Average rainfall for the rest of the week was 3.5 cm. What is the average rainfall for the entire week?
Archives for July 2014
Sum of weights of 25 students is 1275 kg. Out of these 25 students, 24 students are chosen randomly and their average weight comes out to be 50 kg. How much is the weight of one remaining student?
Mike scores average of 21 in 7 math tests. His average in the first 3 tests is 19. What is his average in the last 4 tests?
Radii of two spheres are 3 cm and 27 cm respectively. What is the ratio of surface area of the first sphere to the surface area of the second sphere?
Radii of two spheres are 3 cm and 27 cm respectively. What is the ratio of volume of the first sphere to the volume of the second sphere?