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TSA ( TOTAL SURFACE AREA) OF CYLINDER IS 2πr(r+h). given r= 1.4cm and h = 2.1 cm
= 2×22/7×1.4×(1.4+2.1)
= 2×22×0.2× 3.5. ( 7 and 1.4 cancelled we get 0.2)
= 44×0.2×3.5
= 30.8 sq.cm
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