an = a1 + (n - 1).r
r = a2 - a1
r = -4 - (-1)
r = -4 + 1
r = -3
an = a1 + (n - )
an = -1 + (n - )
an = -1 + (-3n + 3)
an = -1 - 3n + 3
an = 2 - 3n
side length of w = 45×w/1000t cm
the actual length of side t is .045 cm.
and we have to use the scale drawing to find the actual side with a length of w.
to get the scale we will use unitary method.
∵ length t is measured on scale=.045 cm
∴ length of w will be measured as (.045×w)/t cm
or length =