This is two tricky optimisation with calculus problems taken from Underground Mathematics. There are links in the notes to the original questions (and the solutions can be found there).
For the second question I have built the shape in Geogebra which can be found here:
Something went wrong, please try again later.
This resource hasn't been reviewed yet
To ensure quality for our reviews, only customers who have downloaded this resource can review it
Report this resourceto let us know if it violates our terms and conditions.
Our customer service team will review your report and will be in touch.
£0.00