Suppose it takes 45 hours for robot A to construct a new robot. Working together with robot B, it takes 25 hours for both robots to construct a new robot. How long would it take robot B to construct a new robot, working alone

56 hours 25 minutes

Step-by-step explanation:

Given:

Suppose it takes 45 hours for robot A to construct a new robot

It takes 25 hours for both robots to construct a new robot.

Question asked:

How long would it take robot B to construct a new robot, working alone ?

Solution:

Let the time taken by robot B to construct new robot =

By robot A

It takes 45 hours to construct = 1 new robot

It takes 1 hour to construct =

By robot B

It takes hours to construct = 1 new robot

It takes 1 hour to construct = new robot

By working together

It takes 25 hours to construct = 1 new robot

It takes 1 hour to construct =

new robot is constructed in = 1 hour

New robot is constructed by both working together in 1 hour = New robot is constructed by robot A in 1 hour + New robot is constructed by robot B in 1 hour

Subtracting both sides by

Thus, robot B would take 56 hours 25 minutes to construct a new robot, working alone.

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

step-by-step explanation: