A batch of bottles were packed in 25 boxes with 12 bottles in each box. If the same batch is packed using 20 bottles in each box, how many boxes would be filled?

A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?

A hemispherical bowl of radius 9 cm is full of liquid. The liquid is to be filled into cylindrical shaped small bottles, each of diameter 3 cm and height 4 cm. How many bottles are needed to empty the bowl.

There are some balls and marbles in a box.The square of the number of marbles exceeds the number of balls by 38.If four more marbles had been in the box,the numbers of ball would have been same as that of marbles.Find the number of balls and marbles.

In how many ways can one post 3 letters in 5 post boxes?

Two boxes of volume 1m^3 & 2m^3 respectively are filled with electrolytic solution containing 1 mole electrolyte in each box. What do you say about specific conductance and molar conductance in each box?

In a school,students thought of planting tress in and around the school to reduce air pollution.It was decided that the number of trees that each section of each class will plant will be the same as the class in which they are studing e.g.a section of I class will plant 1 tree,a section of II class will plant 2 trees and so on,a section of XII class will plant 12 trees.There are three sections of each class. Find out how many trees were planted.

A survey was made to find the type of music that a certain group of young people liked in a city. Adjoining pie chart shows the findings of this survey. From this pie chart answer the following: If a cassettle company were the make 1000 CD's how many of each type would they make?

If a box of sweets is divided among 24 children, they will get 5 sweets each. How many would each get, if the number of the children is reduced by 4?

A company sells biscuitws. For packing purpose they are using cuboidal boxes : box A rarr 3 cm xx 8 cm xx 20 cm, box B rarr 4 cm xx 12 cm xx 10 cm . What size of the box will be econmical for the company? Why? Can you suggest any other size (dimensions) which has the sdame volumne but is more economical than these?