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1 markScales and Scale Drawings

CSEC Mathematics · May/June 2018 · Paper 2 · Question 6(b)(i)

A globe is a scaled spherical representation of the earth. The actual length of the equator (LL) is 40 000 km and is represented on the globe by a piece of string of length 160 cm.

What length of string would represent an actual distance of 500 km on the globe?

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  1. 6(a)(i)the circumference of the disc[1 mark]
  2. 6(a)(ii)the area, in mm², of the cross-section of the disc.[2 marks]
  3. 6(a)(iii)Given that the thickness of the disc is 2 mm, calculate the maximum number of discs that can be constructed from 1000 cm³ of available metal. (1 cm³ = 1 000…[3 marks]
  4. 6(b)(ii)The distance between Palmyra (P) and Quintec (Q) is represented on the globe by a string of length 25 cm. Calculate the value of PQ, the actual distance, in…[2 marks]

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