Question

A. Thyroxine
(2) The wear and tear is found in some paris of the machine
after prolong use for this
is responsiblr
A. muscular force
В. gravitational force
C. electrostatic force
D. frictional force​

Answer 1

Answer:

The perimeter of a rectangle is 40cm and its area is 96 sq cm calculate its length and breadth?

Let the length and breadth of the rectangle be L and B.

2(L+B) = 40, or

L + B = 20, or

B = 20-L …(1)

LB = 96 …(2). Put value of B from (1) in (2), to get

L(20-L) = 96, or

20L - L^2 = 96, or

L^2–20L+96 = 0

(L-12)(L-8) = 0, or

L = 12 or 8 (not acceptable), while B = 8 or 12 (not acceptable)