Question

Alice is making a necklace. She has a chain that is 400 mm long. She puts forty 1.7 mm beads, twenty-seven 6.5 mm beads, and eight 3.4 mm beads on the chain. How much of the 400 mm chain is left without bead?

Answer 1

129.3mm chain left without beads

Explanation:

Equation:

400mm long chain - [(40 x 1.7mm) + (27 x 6.5mm) + (8 x 3.4mm)]

= chain left without beads

Calculation:

40 beads x 1.7mm = 68mm

27 beads x 6.5mm = 175.5mm

8 beads x 3.4mm = 27.2mm

(68mm + 175.5 mm + 27.2mm) = 270.7mm chain with beads

400mm chain - 270.7mm chain with beads

= 129.3mm chain left without beads