Question

Find the L and B of a rectangle with perimeter 78 cm, if the length of greater than the breadth by 5cm.
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Answer 1

Answer:

$\huge\bf\red{QuestioN}$

Find the length and breadth of a rectangle with perimeter 78 cm , if the length is greater than the breadth by 5 cm.

$\huge\bf\red{Answer}$

$\mathtt\purple{given}$

• perimeter is 78 cm.

• length is greater than breadth by 5 cm.

$\mathtt\purple{to\:find}$

• length = ?

• breadth = ?

$\mathtt\green{Explanation}$

• let breadth be x.

• therefore length = x + 5 cm .

Perimeter = 2×(l+b)

➡️ 78 = 2×(x+x+5)

➡️ 78 = ️ 2×(2x+5)

➡️ 78 = ️ 4x + 10

➡️ 78 - 10 = 4x

➡️ 4x = 68

➡️ x = 68/4

➡️ x = 17

• length = x + 5

➡️ 17 + 5

➡️ 22 cm

• breadth = x

➡️ 17 cm