Question

The surface area of a cuboid is 1300 cm .if it's length is 15 cm and height is 20 cm find its breadth​

Answer 1

Answer:

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The length of the cuboid is 15 cm.

Let the length of the cuboid be l cm.

Breadth of the cuboid is 10 cm

Height of the cuboid is 20 cm.

Total surface area of the cuboid is 1300 cm²

Formula to find the surface area of the cuboid is 2(lb + bh + hl).

1300 = 2 (10l + 200 + 20l)

650 = 30l + 200

450 = 30l

l = 15 cm

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Answer 2

$\huge\red{ANSWER}$

Given:-

l=length=15cm

h=height=20cm

b=breath

sa=surface area=1300

Solution:-

♠SA=2lb+2lh+2hb

♠1300=2(15)(b)+2(15)(20)+2(20)(b)

♠1300=30b+600+40b

♠1300-600=30b+40b

♠700=70b

♠b=700/70

♠b=70

Therefore, breath=70cm

$\color{red}\boxed{b=70}$

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