Question

Rahul donate some part of his income to an orphanage every month in a particular month he wishes to donate toys for the children each toy is in the form of a cone mounted on a cylinder of common base radius 7 cm the total height of the toys 25 cm and height of the conical part is 3 cm find the volume of each toy also find the cost of materials used in making one Toy at Rupees 15 per cm square

Answer 1

Radius of cone=7cm 
Height of cone=3cm 
Radius of cylinder=7cm 
Height of cylinder= 25-3=22cm 
Volume of the toy= Volume of cone+ Volume of cylinder 
1/3?r^2H+?r^2h 
?r^2(1/3H+h) 
22/7*7*7 (1/3*3+22) 
22*7(1+22) 
22*7*23 
3542 cubic cm 
Now cost of each toy = Rs.15*3542 = Rs.53130 
Values: Kind-hearted, caring, helpful,compassionate