surface area of a tunnel is 550 m square the Tunnel is a 25 m long cylinder find the diameter of the tunnel
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7
Answer:the answer is 6.22m
Step-by-step explanation:
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Area of tunnel=550m
long of tunnel=25m
according to question,
area of tunnel=550
pi r^2 h=550
22×r×r×25
-----------------=550
7
r^2=550×7
----------
22×225
r^2=7
r =root 7
d=2r
=2root7
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