Seudónimo Seudónimo
  • 14-12-2018
  • Mathematics
contestada

In the pully system shown in this figure, MQ = 10 in, NP = 3in and QP=24in. Find MN
a. 25
b. 26
c. 27
d. 28

In the pully system shown in this figure MQ 10 in NP 3in and QP24in Find MN a 25 b 26 c 27 d 28 class=

Respuesta :

DelcieRiveria DelcieRiveria
  • 24-12-2018

Answer:

The correct option is a. The length of MN is 25.

Step-by-step explanation:

Given information: MQ = 10 in, NP = 3 in and QP=24 in.

If the centers of two circles of radius r₁ and r₂ are d units apart, then the length of the direct common tangent between them is

[tex]l=\sqrt{d^2-(r_1-r_2)^2}[/tex]

[tex]24=\sqrt{d^2-(10-3)^2}[/tex]

Square both sides.

[tex]576=d^2-49[/tex]

[tex]625=d^2[/tex]

Take square root both sides.

[tex]25=d[/tex]

Therefore  length of MN is 25 and option a is correct.

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