Question

(27) The sum of length, breadth and height of a cuboid is p and its
diagonal is t them its surface area is
2
a. p? +t?
b. p? – ?
р
C.
tul
d. p?t?​

Answer 1

Answer:

p^2 - t^2

Step-by-step explanation:

Sum of length ,breadth , height :  l + b + h = p                      ---   equation 1

Diagonal                                       :  l^2 + b^2 + h^2 = t^2       ---  equation 2

squaring equation 1 , and from equation 2

l^2 + b^2 + h^2 + 2 hl + 2 lb + 2 hb = p^2

t^2 + 2 hl + 2 lb + 2 hb  = p^2

2 hl + 2 lb + 2 hb  = p^2 - t^2