Question

25. 66 cm" of silver is drawn into a wire 1 mm in diameter. The length of the wire will be
(a) 78 m
(b) 84 m
(c) 96 m
(d) 108 m
26. The height of a cylinder is 14 cm and its diameter is 10 cm. The volume of the cylinder is
70​

Answer 1

Answer:

As we know that volume of wire is volume of cylinder

And in given question silver wire is drawn from 66 cubic centimeters of silver.

So, we can equivalent the volume of cylinder with 66 cubic centimeters.

we know that volume of cylinder is π×r

2

×l. [ where l= length and r= radius ]

Given, r=

2

1

mm

i.e. r=0.5 mm

i.e r=0.05 cm

According to question π×r

2

×l=66

i.e.

7

22

×(0.05)

2

×l=66

By solving this question, we get l=8400 cm.

So, length of wire in metres is 84 m.

Answer 2

Answer:

84m

Step-by-step explanation:

ok na

here is the answer