10 (a) H G F E NOT TO SCALE D C x cm A x cm B ABCDEFGH is a cuboid with a square base of side x cm. CG = 20cm and AG = 28cm. Calculate the value of x. x = ................................................ [4] © UCLES 2023 0580/42/M/J/23 19 (b) R Q N P NOT TO SCALE M L J K The diagram shows a different cuboid JKLMNPQR. MR = 30cm correct to the nearest centimetre. KR = 37cm correct to the nearest centimetre. Calculate the lower bound of the angle between KR and the base JKLM of the cuboid. ................................................. [4] © UCLES 2023 0580/42/M/J/23 20 BLANK PAGE Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge Assessment International Education Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cambridgeinternational.org after the live examination series. Cambridge Assessment International Education is part of Cambridge Assessment. Cambridge Assessment is the brand name of the University of Cambridge Local Examinations Syndicate (UCLES), which is a department of the University of Cambridge. © UCLES 2023 0580/42/M/J/23