Question

The diameter of a circle is measured to be 5.6m correct to 2 s.f.
(a) Find the upper and lower limits for the perimeter of the circle
(b) Find the upper and lower limits for the area of the circle

Answer 1

Answer:

ȶɦɛ ʊքքɛʀ ɮօʊռɖ ɨֆ 75 ӄɢ, ɮɛƈǟʊֆɛ 75 ӄɢ ɨֆ ȶɦɛ ֆʍǟʟʟɛֆȶ ʍǟֆֆ ȶɦǟȶ աօʊʟɖ ʀօʊռɖ ʊք ȶօ 80ӄɢ. ǟ զʊɨƈӄ աǟʏ ȶօ ƈǟʟƈʊʟǟȶɛ ʊքքɛʀ ǟռɖ ʟօաɛʀ ɮǟռɖֆ ɨֆ ȶօ ɦǟʟʋɛ ȶɦɛ ɖɛɢʀɛɛ օʄ ǟƈƈʊʀǟƈʏ ֆքɛƈɨʄɨɛɖ, ȶɦɛռ ǟɖɖ ȶɦɨֆ ȶօ ȶɦɛ ʀօʊռɖɛɖ ʋǟʟʊɛ ʄօʀ ȶɦɛʊքքɛʀ ɮօʊռɖ ǟռɖ ֆʊɮȶʀǟƈȶ ɨȶ ʄʀօʍ ȶɦɛ ʀօʊռɖɛɖ ʋǟʟʊɛ ʄօʀ ȶɦɛ ʟօաɛʀ ɮօʊռɖ.