Question

320 numbers of steel pipes each of outer diameter 1.4 m, were used in laying a pipe line from an oil collecting station to an oil refinery. If the area of the outer curved surface of a pipe is 66 metre square, find the length of the whole pipe line

Answer 1

Step-by-step explanation:

D= 1.4m

r = 0.7 m

CSA =66m²

2πrh = 66

2×22/7 × 0.7 ×h = 66

h = 66×7/ 22×2×0.7

h = 3×10 /2

h= 15 m

Total length = total pipes× h

= 320× 15

= 4800 m