Question

The compound ratio of 3:4 and the inverse ratio of 4:5 is 45:x. Find x​

Answer 1

Answer:

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

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Required answer-:

The compound ratio of 3:4 and 5:4

then 3 and 5 & 4 and 4 = 15:16.

He ashed x so , 45 = 15 × 3

= 15 × 3 : 16 × 3

= 45 : 48

x = 48

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