Upper and lower boundsIB MYP Maths Extended: Mind map

Exam questions on Upper and lower bounds

1. A rectangular plot has length $48$ m and width $35$ m, each measured correct to the nearest metre.
   Find the lower bound of the area of the plot.2 marks
2. A runner covers a distance of $100$ m, measured to the nearest metre, in a time of $12.4$ seconds, measured to the nearest $0.1$ second.
   Calculate the lower bound of the runner's average speed, correct to 3 significant figures.2 marks
3. A parcel contains $6$ identical books and an empty box. Each book has mass $450$ g, correct to the nearest $10$ g. The box has mass $1.2$ kg, correct to the nearest $0.1$ kg.
   Find the upper bound of the total mass of the parcel, in kilograms.3 marks