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4 problems match “unit conversion”. Clear

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1. Average speed of a drive ●○○○○ 10 ptsKaren drove continuously from 9:40 a.m. until 1:20 p.m. of the same day and covered a distance of 165 miles. What was her average speed in miles per hour?
2. Concrete needed for pillars ●○○○○ 10 ptsEach pillar of a temple is a cylinder with a circular base of radius 20 cm and height 10 m. How many cubic metres of concrete mixture are required to build 14 such pillars? Use $\pi \approx \frac{22}{7}$.
3. Bricks painted by a container ●●○○○ 20 ptsA container has enough paint to cover an area of $9.375$ m$^2$. Each brick measures $22.5$ cm by $10$ cm by $7.5$ cm, and its whole surface is painted. How many such bricks can be painted with the paint in the container?
4. Bricks that a container of paint covers ●●○○○ 20 ptsA container of paint is enough to paint an area of $9.375\ \text{m}^2$. Each brick measures $22.5\ \text{cm} \times 10\ \text{cm} \times 7.5\ \text{cm}$. Assuming the whole surface of each brick is painted, how many bricks can be painted with this paint?