Question

6) A metal pipe has internal radius of 2.5 cm. The pipe is 2 mm thick all
round. Find the weight in kilogram, of 2 m of the pipe if 1 cm of the metal
weight 7.7 g​

Answer 1

Answer:

5.029kg

Step-by-step explanation:

outer radius=2.5cm+0.2cm=2.7cm

length=200cm

volume=π(outer^2 - inner^2)h

volume=3.14(2.7^2-2.5^2)200

volume=653.12

weight=653.12×7.7=5029.024g

weight=5.029kg