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length of diagonal d is 50 m. (first option is correct)

Step-by-step explanation:

using pythagoras theorem

here 40 and 30 are the legs of the triangle so let them be a and b respctively.

And d is the hypotenuse so let it be c

a^2 + b^2 = c^2

40^2 + 30 ^2 = d^2

1600 + 900 = d^2

2500 = d^2

50 = d

2.3

Step-by-step explanation:

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