For the following questions answer them individually
Rohit and Mohit can do a piece of work in 4 days, while Ram and Shyam can do the same work in 12 days. In how many days will Rohit, Mohit. Ram and Shyam do it together?
The pie chart given below shows the number of teachers in five universities. The total teachers in all these five universities are 720. The number of teachers in a particular university is shown in terms of degree with respect to the total number of teachers in all these five universities.
J1 = The value of average number of teachers in B and C.
J2 = The value of average number of teachers in A and E.
What is the value of (J2 + J1)?
A boat can travel with a speed of 15 km/hr in still water. If the speed of the stream is 5 km/hr, find the time taken by the boat to go 80 km downstream.
A work was finished by L, P and Q together. L and P together finished 50 percent part of the work and P and Q together finished 60 percent part of the work. Who among the three is most efficient?
A shopkeeper sells a book at a loss of 60 percent. Had he sold the book for Rs. 150 more, then he would have suffered a loss of 30 percent. To earn a profit of 20 percent, what should be the selling price of the book?
135 kg of an alloy A is mixed with 72 kg of alloy B to get a new alloy. If alloy A has zinc and copper in the ratio 4 : 5 and alloy B has zinc copper in ratio 7 : 5, then what is the weight of zinc in the new alloy?
Cost price of watch is Rs. 750. If the loss percentage is 40 percent, then what is the value of loss?
Simple Interest received by a person in 15 years on a principal of Rs. 6000 is 150 percent of the principal. What is the annual rate of interest?