IB ACIO 19 February 2021 Morning Shift

There are two teams I and II of workers at a bridge construction site. Each team consists of W workers. On a particular day, a worker was shifted from team I to team IL Now, if the ratio of the amount of work done by team I in (W + 1) hours and by team II in (W + 2) hours is 10 : 12, respectively, then W is equal to:

Ratio of milk and water in two mixtures A and B is c.: b.and d.: c.respectively. If A and B are mixed in the ratio of 1 : b. then what is the ratio of milk and water in final mixture?

Anshu takes twice as much time as Bablu and thrice as much time as Chandu to finish a piece of work. Together it takes c.days to finish the work. What is the time taken by Anshu to finish the work?

A number is increased by 10 percent. Then it is decreased by 20 percent. If the final value of number is 528, then what is the initial value of number?

In a bookshop, the average number of biology, chemistry and physics books is 360. The biology books are 180 more than the average number of chemistry and physics books. The number of physics books is 180 less than the average of biology and chemistry books. What is the number of chemistry books in the shop?

A sum of money becomes 6 times at simple interest in 15 years. What is the rate of interest?

Find the volume of cone which has base radius as 7 cm and height as 12.cm. (The value of π is 22/7)

The ratio of price of a mango and an apple is 3 : 2 If the total price of an apple and a mango is Rs. 100, then find the price of a mango.

What is the average of 132,146,218,232,321 and 223

If the volume of a room is 1680 m³ and the area of the floor is 112m². Find the height of the room.