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In Mathematics / Middle School | 2014-11-15

A block of stone measures 15 cm x 15 cm x 20 cm. What is the total surface area of the stone?

(Hint: A block has six sides.)

Asked by lejanmeswt1

Answer (2)

L oo k a t t h e p i c t u re . 2 s i d es : 15 c m × 15 c m A re a : A 1 ​ = 2 × ( 15 c m × 15 c m ) = 2 × 225 c m 2 = 450 c m 2 4 s i d es : 15 c m × 20 c m A re a : A 2 ​ = 4 × ( 15 c m × 20 c m ) = 4 × 300 c m 2 = 1200 c m 2 A re a o f t h e b l oc k : A = A 1 ​ + A 2 ​ A = 450 c m 2 + 1200 c m 2 = 1650 c m 2 ​

Answered by Anonymous | 2024-06-10

The total surface area of the block of stone measuring 15 cm x 15 cm x 20 cm is calculated by finding the area of each set of faces and summing them up, resulting in a total surface area of 2250 cm².
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Answered by Anonymous | 2024-10-11

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