Question

कार्डबोर्डवर 8 सेमी लांब आणि 5 सेमी रुंद असे चित्र रंगविले गेले आहे की त्या बाजूच्या बाजूने 1.5 सेमी फरकाचा अंतर आहे. समासचे एकूण क्षेत्र शोधा.

Answer 1

Analyse:

Area of the path = Area of the Outer rectangle – Area of the Inner rectangle

Given:

• Length of the picture painted on the cardboard = 8 cm.
• Breadth of the picture painted on the cardboard = 5 cm.
• Measure of the margin = 1.5 cm.

To Find:

Total area of the margin.

Solution:

Length of the outer rectangle = 8 cm.

Breadth of the outer rectangle  = 5 cm.

Area of the outer rectangle $:\implies$ 8 × 5 = 40 m²

Length of the inner rectangle = 8 –(1.5 + 1.5 ) = 8 – 3 = 5 cm.

Breadth of the inner rectangle = 5–(1.5 + 1.5 ) = 5 – 3 = 2 cm.

Area of the inner rectangle $:\implies$ 5 ×2 = 10 m²

Area of the path $;\implies \boxed{40-10=30cm^{2} }$

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Hence, area of the path is $30cm^{2}$

Answer 2

ℕℝ

Area of outer rectangle : 8×5 = 40 m²

Area of inner rectangle : 5×2= 10m²

Area of path: 40-10= 30 m²

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