Convert 241 in base 5 to base 8,

Find the least length of a rod which can be cut into exactly equal strips, each of either 40cm or 48cm in length

Reduce each number to two significant figures and then evaluate \(\frac{0.021741 \times 1.2047}{0.023789}\)

A train moves from P to Q at an average speed of 90km/h and immediately returns from Q to P through the same route at an average speed of 45km/h. Find the average speed for the entire journey