A rectangle is 14 cm long and 6 cm wide. Find its perimeter and area.

Perimeter = 2 x (14 + 6) = 40 cm; Area = 14 x 6 = 84 sq cm.

A plot is 20 m by 15 m. Find the cost of fencing it at Rs 5 per metre.

Perimeter = 2 x (20 + 15) = 70 m; Cost = 70 x 5 = Rs 350.

Area is about 15 + (8/2) + 3 = 15 + 4 + 3 = 22 sq cm.

Class 5 · Mathematics

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Find the area of a square with side 9 cm.

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