Maths Olympiad Prep

Library / UKMT Grey Kangaroo /227 of 242

UKMT Grey Kangaroo, 2018

Geometry Difficulty 3.0 AMC 10/12 Find the answer United Kingdom

The diagram shows a rectangle of size 7 cm×11 cm7\text{ cm}\times11\text{ cm} containing two circles that each touch three of the sides of the rectangle. What is the distance between the centres of the two circles?

(A) 22 cm (B) 2.52.5 cm (C) 33 cm (D) 3.53.5 cm (E) 44 cm

Figure for this problem

We don't reproduce this publisher's solutions. Their own solution is here — work the problem first.
Want a route through all this instead of an archive? The track puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.

Source: UK Mathematics Trust, licensed © UK Mathematics Trust; past papers published free at ukmt.org.uk. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.