Question

a metal strip having sides 17*7*5cm is melted down and coins each of diameter 1.4cm and thickness 0.08cm .assuming no wastage how many coins can be minted​

Answer 1

Answer:

4837 coins

explanation:

Given,

height = 5cm = 0.05m

breadth = 7cm = 0.07m

Length = 17cm = 0.17 m

volume = L.b.h

» 0.05* 0.07* 0.17*

» 5.95x 10^-4 m^3

Let the total number of coins that can be made from this volume be n

diameter = 1.4 cm = 0.014m

r= 7x10^-3m

height = 0.08cm = 8x10^-4m

Volume = n *πr^2h

» n*π*(4.9x10^-5)(8x10^-4)

» n* (1.23x10^-7)

Volume remains same

Therefore, value of

n = 4837.3

approx to 4840 coins

Also refer : https://brainly.in/question/6397405