An uncompressed bitmap image has a resolution of 800 × 600 pixels and uses 24-bit colour depth. What is the file size in mebibytes (MiB), to 3 significant figures? (Use 1 MiB = 1 048 576 bytes)

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Question

An uncompressed bitmap image has a resolution of 800 × 600 pixels and uses 24-bit colour depth. What is the file size in mebibytes (MiB), to 3 significant figures? (Use 1 MiB = 1 048 576 bytes)

Accepted Answer

1.37 MiB — File size = width × height × colour depth = 800 × 600 × 24 = 11 520 000 bits. In bytes: 11 520 000 ÷ 8 = 1 440 000 bytes. In MiB: 1 440 000 ÷ 1 048 576 ≈ 1.37 MiB (3 s.f.). Option D uses only 8-bit colour; Option A forgets to divide by 8; Option B uses 1 MiB = 1 000 000 bytes incorrectly.

Answer

0.457 MiB

Answer

1.44 MiB

Answer

1.37 MiB

Answer

11.0 MiB

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