Question

A metal strip having sides 17 × 7× 5 cm is melted down and minted into

coins each of diameter 1.4 cm and thickness 0.08 cm. Assuming no

wastage, how many coins can be minted ?​

Answer 1

Answer:

Solution:

Metal strip has dimensions 17 x 7 x 5 cm

Volumeofmetalstrip=17x7x5=595cm3Volumeofmetalstrip=17x7x5=595cm3

Coinhasdiameter1.4cm∴radius=0.7cmCoinhasdiameter1.4cm∴radius=0.7cm

Volumeofonecoin=πr2hVolumeofonecoin=πr2h

=π(0.7)2(0.08)=π(0.7)2(0.08)

=0.123=0.123

Numberofcoinmethod=VolumeofmetalstripVolumeofonecoinNumberofcoinmethod=VolumeofmetalstripVolumeofonecoin

=5950.123=5950.123

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