For the following questions answer them individually
Raju can do a piece of work in 20 days, while Ram can do it in 30 days. If both of them work at it. together, then the number of days in which they will be able to finish the work is
P is twice as good a workman as Q and together they finish a piece of work in 20 days. In how many days will P alone finish the work ?
A spherical ball of lead of radius 14 cm is melted and recast into spheres of radius 2 cm. The number of the small spheres is
Using the pic-chart answer the following :
If the annual income of the family is 60,000, then the savings isÂ