V=81 000cm³
V=Ab *h
Ab=L*w
Ab=45*30
Ab=1350cm²
V=1350*h
1350*h=81 000
h=81 000/1 350
h=60cm answer variant b)
Answer:
A
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
using the definition of n =
where n! = n(n- 1)(n - 2)......× 3 × 2 × 1
here n = 7 and r = 4, hence
7
=
= ← cancel 3 × 2 × 1 leaving
7 = 7 × 6 × 5 × 4 = 840 → D
∵ the two triangles are congruent
AB / AD = BC / DE
8/4 = 6/ DE
DE = 6 x 3 ÷ 8 = 3 cm