Question

Plzz help me!! 1. An open box is made of wood 3 cm thick.Its external length, breadth and height are
1.46 m, 1.16 m and 8.3 dm respectively. What is
the cost of painting the inner surface of the box
at 50p per 100 cm?
2. 66 cm of silver is drawn into a wire 1 mm in
diameter. What is the length of wire in metres ?​

Answer 1

Answer:

2) 84000 metres

Step-by-step explanation:

Given

66 cm3 of silver = 0.66 m3

1 mm = 0.001 m

hence,

r = d/2 = 0.001/2

To Find

h = ?

Solution

According to given condition,

Volume of silver = Volume of wire

0.66 =

$\pi \: r {}^{2} h$

0.66 = 22/7 × (0.001/2)2 ×h

Hence,

0.66 ×7/22 × 4/ 0.00001 = h

21×3/0.001 = h

84/0.001 = h

Hence,

h = 84000