A baker wants to prepare some bread to be cooked by 2.15 p.m.2.15\text{ p.m.}2.15 p.m.. She uses an oven with an automatic timer that can be set to switch on and off at certain times. The oven needs to be switched on for 3 hours 35 minutes3\text{ hours } 35\text{ minutes}3 hours 35 minutes. At which time does the oven need to switch on?
10.40 a.m.10.40\text{ a.m.}10.40 a.m.
11.20 a.m.11.20\text{ a.m.}11.20 a.m.
5.50 p.m.5.50\text{ p.m.}5.50 p.m.
10.40 p.m.10.40\text{ p.m.}10.40 p.m.
164 exam-style questions on CIE IGCSE Physics Physical quantities and measurement techniques, covering Physical quantities and measurement techniques. Each one has a worked solution and a mark scheme showing where the marks go.