Question

choose the correct answer.

1. if the hight of a cylinder become's 1/4 of the original height and the radius is double, then which of the following will be the true.
a. volume of the cylinder will be doubled.
b. volume of the cylinder will be halved.
c. volume of the cylinder will remain unchanged.
d. volume of the cylinder will be 1/4 of the original volume.

2 question.

a bicycle wheel makes 500 revolutions in moving 1 km. the diameter of the wheel is
a. 44/7 m
b. 7/11 m
c. 7/22 m
d. none

3 question.

if the area of the trapezium is 34 CM ( square) and th length of one of the Paralle sides is 10 CM and it's height is 4 CM. the length of the other parallel side is
a. 3.5 CM
b. 7 CM
c. 14 CM
d. 21 CM .

the area of the quadrilateral is ( given at first) .
a. 10 CM square.
b. 8 CM square
c. 12 CM square
d. 6 CM square .

please answer this quick!!.
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Answer 1

Answer:

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Answer 2

Answer:

answer of 1st is C

answer of 2nd is B

answer of 3rd is B

answer of 4th is D