Question

If a:b:c = 5:2:3, evaluate
a. a-2b:3b-c
b. a+b+c: 5a
c. a-b: b+c
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Answer 1

Answer:

QUESTION:

Find the lateral surface area and total surface area of a cuboid of length 80 cm, breadth 40 cm and height 20 cm.

ANSWER

l=80cm,b=40cm,h=20cm

Therefore,

TSA = 2(lb+bh+hl)

=2(80×40+40×20+80×20)=11200 cm²

LSA = 2(l+b)h=2(80+40)20=4800 cm²

I hope this will be help you.

Answer 2

Answer:

a.1:3

b.2:5

c.3:5

Step-by-step explanation:

a.let a=5x,b=2x,c=3x

a-2b=5x-4x=x

and 3b-c=6x-3x=3x

therefore,a-2b:3b-c=x:3x=1:3

b.a+b+c=5x+2x+3x=10x

and 5a=25x

therefore a+b+c:5a=10x:25x=2:5

c.a-b=3x

b+c=5x

therefore a-b:b+c=3x:5x=3:5