Question

27. The length, breadth and height of a
cuboid are (log 125 + log 8), (log 1000
- log 10) and log 10 respectively. Find
the total surface area of the cuboid.
28. Draw a rough diagram (graph) of lin-
ear equation x = 2.
SECTION - IV​

Answer 1

Answer:

Answer: 22 sq. units

Step-by-step explanation:

Required formulas:

log a + log b = log (a*b)

log a – log b = log (a/b)

log aᵇ  = b log a

log 10 = 1

We are given,

Length, l = (log 125 + log 8) = log (125*8) = log 1000 = log 10³ = 3 log 10 = 3

Breadth, b = (log 1000-log 10) = log (1000/10) = log 10² = 2 log 10 = 2  

Height, h = log 10 = 1

The formula for the total surface area of cuboid is given as,

Total Surface Area of Cuboid = 2 * [lb + bh + hl]

Thus, substituting the given values of l, b & h, we get

The Total Surface Area of Cuboid as,

= 2 * [(3*2) + (2*1) + (1*3)]

= 2 * [6 + 2 + 3]

= 2 * 11

= 22 square