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1. ### The parallel sides of a trapezium are 10 cm and 20 cm respectively. AD = 6 cm and CB =8 cm . Find the area of the trapezium ?

... and CD are the parallel sides with lengths 10 cm and 20 cm , respectively. See the attached sketch. Let point ...

3 Answers · Science & Mathematics · 03/08/2020

2. ### The area of a sector of a circle with a radius of 15 cm is 75pi cm ^2. ?

The area of a sector of a circle with a radius of 15 cm is 75pi cm ^2. ? Total circle Area = π(15)^2 = 225π cm ^2...

11 Answers · Science & Mathematics · 28/05/2020

3. ### The perimeter of a rectangle is 56 cm . Find the lengths of the sides of the rectangle giving the maximum area.?

A=l*w 56= 2l + 2w; w= 28 - l A= l*(28 - l)= 28l - l² dA/dl= 28 - 2l= 0 l= 14 cm , w= 14 cm

4 Answers · Science & Mathematics · 19/05/2020

4. ### a spherical snowball is melting symmetrically at the rate of 4pi cubic cm per hr. how fast is the diameter changing when it is 20 cm ?

...  dV/dt = 4πr².dr/dt so, when the diameter is 20 cm we have: -4π = 4πr².dr/dt Hence, dr/dt = -1/r² i.e. dr...

3 Answers · Science & Mathematics · 15/08/2020

5. ### The legs of an isosceles triangle are each 45 cm long.The measures of the base angles are each 70°. What is the measure of the third side?

apply the law of sine ..a................b ---------=-------------- .sin(A)........sin(B) ..45..............b --------- = ----------- .sin(70) ....sin(40) 45sin(40) = bsin(70) b = 30.78 cm or 31 cm answer//

2 Answers · Science & Mathematics · 06/10/2020

6. ### A gallon of homogenized, vitamin A, whole milk has a weight ranging from 8.48 - 8. 72 lbs. Determine its volume in cm ^3.?

1 US gallon is 231 cubic inches 1 inch is 2.54 cm 231 * 2.54^3 => 3,785.411784 cm ^3

3 Answers · Science & Mathematics · 03/09/2020

7. ### A cone has a diameter of 6 cm and a slant height of 5 cm . What is the exact volume (in cubic centimeters) of the cone?....?

...and h r² + h² = s² 3² + h² = 5² h = 4 cm V = 1/3 π(3)²(4) V = 12π Answer C

4 Answers · Science & Mathematics · 11/06/2020

8. ### How much is 1.1 cm in inches?

1.1 cm = 0.4330708661417323 in

6 Answers · Science & Mathematics · 01/07/2020

9. ### a sphere has the volume 36π cm ^3 .What area does the sphere have?

The volume of a sphere with radius "r" is given by: V = 4*π*r³/3 so: r = (3V/(4π))^(1/3) The surface area of a sphere with radius "r" is given by: A = 4π*r² You want to know the area given the volume...

4 Answers · Science & Mathematics · 31/10/2019

10. ### If ED = √8 cm and the area of ∆ABC = trapezoid ACDE, the length of AC is?

AC = 2.  See below for explanation. Notice that there are two similar triangles, ABC and EBD.  The area of EBD is twice that of ABC, since the trapezoid area is equal to that of triangle ABC. But, the square...

3 Answers · Science & Mathematics · 19/12/2019