Answer / soham manna

400mm

144/100*275=396mm or 400mm

Answer / anusha

Spacing is directly proportional to square of diameter, so
X/275 = 12^2/10^2
X= 396 mm c/c
as per IS 456:2000, spacing should not be greater than 300mm
X = 300 mm

Answer / s k majumder

10/275 = 12/x



x= 330 mm

As dia increase spacing will be increase. however better to spacing limited to 300mm

Answer / anandbala

12 MM

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