Machine `A and B` manufacture x telephone set in 4 and 6 hrs respectively. If they work alternately for 1 hrs;Machine A start first then the time taken to producex telephone -set will be :

A\ a n d\ B can do a piece of work in 6 days and 4 days respectively. A started the work; worked at it for 2 days and then was joined by B . Find the total time taken to complete the work.

A\ a n d\ B can do a piece of work in 6 days and 4 days respectively. A started the work; worked at it for 2 days and then was joined by B . Find the total time taken to complete the work.

In a factory, two machines A and B manufacture 60% and 40% respectively of the total output from which 2% and 1% respectively are defective. If randomly selected one item is defective, find the probability that it was manufactured by machine B.

A manufacturer produces two types of steel trunks. He has tow machines A and B. For completing, the first types of the trunk requires 3 hours on machine A and 3 hours on machine B, whereas the second type of the trunk requires 3 hours on machine A and 2 hours on machine B. Machines A and B can work at most for 18 hours and 15 hours per day respectively. He earns a profit of Rs. 30 and Rs. 25 per trunk of the first type and the second respectively. How many trunks of each type must he make each day to makes maximum profit?

A manufacture produceds two types of steel trunks. He has two machines, A and B. The first type of book case requires 3 hours on machine A and 3 hours on machine B for completion whereas the second type required 3 hours on machine A and 2 hours n machine B. Machines A and B can work at most for 18 hours and 15 hours per day respectively. He earns a profit of Rs.30 and Rs.25 per trunk of the first type and second type respectively. How many trunks of each type must he make each day to make the maximum profit?

Manufacturer produces two types of steel trunks. He has two machines, A and B. The first type of trunk requires 3 hours on machine A and 3 hours on machine B. The second type requires 3 hours on machine A and 2 hours on machine B. Machines A and B can work at most for 18 hours and 15 hours per day respectively. He earns a profit of Rs. 30 per trunk on the first type of trunk and Rs. 25 per trunk on the second type. Formulate a linear programming problem to find out how many trunks of each type he must make each day to maximize his profit.

R and S start walking each other at 10 AM at the speeds of 3 km/hr and 4 km/hr respectively. They were initially 17.5 km apart. At what time do they meet?

The time for half life of a first order reaction is 1 hr. what is the time taken for 87.5% completion of the reaction?

The time for half life of a first order reaction is 1 hr. what is the time taken for 87.5% completion of the reaction?