Question

How many silver coins of diameter 5 cmAnd thickness 4mm have to melted to prepare aCuboid of 12cm×11cm×5cm dimensions

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Given that the dimensions of cuboid are 12/11/5 and the dimensions of cylindrical coil are . R =5 cm and H =.4cm .

Here

Vol. Of cuboid = n× vol of coin

L×B×H = πr^2h ×n

L×B×H / πr^2h = n

11×12×5×7 /22×5^2×.4 = n

132×35/22×25×.4 =n

6×35/25×.4 = n

210/10 = n

Therefore n = 21

Hence, 21 silver coins are required to make a melted cuboid of dimensions 11 × 12×5 cm.