Question

88 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be ?
A) 112 mts
B) 84 mts
C) 96 mts
D) 108 mts

Answer 1

88 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be ?

A) 112 mtsB) 84 mtsC) 96 mtsD) 108 mts

Answer:   B) 84 mts 

SOLUTION

Vol of silver = πR2hπR2h  = 66 C.C  

Given D= 1mm => R = D/2 = 1/20 cm  

 

=> 227×(120)2×h227×1202×h = 66

= 66 x 400 x (7/22) = 8400 cm = 84 mtrs.

Answer 2

Answer:   B) 84 mts 

Explanation:

Vol of silver = πR2hπR2h  = 66 C.C  

Given D= 1mm => R = D/2 = 1/20 cm  

 

=> 227×(120)2×h227×1202×h = 66

= 66 x 400 x (7/22) = 8400 cm = 84 mtrs.