1.what is the volume of a book that has a width of 10cm,a le

1.what is the volume of a book that has a width of 10cm,a length that is 2 times the width,and a height that is half the width?remember to express your answer in cubic units
2.a jar contains 30mL of glycerin (whose mass is 37.8 g).which liquid is on top?show your work,and explain your answer.