Question

how many coins 4 cm in diameter and thinkness 1cm must be melted down to from a rectangular solid whose edges are 80cm×15.4cm×10cm.​

Answer 1

Step-by-step explanation:

cuboid= l×b×h

80cm×15.4cm×10cm=

12,320cm^3

volume of cylinder = πr^2h

r= 2cm. h =1cm

= 22/7 × 2^2 × 1

= 22/7 × 4 × 1

= 88/7

=12.57cm^3

volume of cuboid divided by volume of cylinder

12,320cm^3/12.57cm^3

980.1

so nearly 980 coins are needed.

i hope that its correct