Question

find lsa and tsa of cylinder having base radius 10.5 and height 18 cm​

Answer 1

Answer:

Step-by-step explanation:

Radius=10.5 cm

Height=18 cm

Lsa = 2πrh

=2×22/7×10.5×18

=1188 cm²

Hence, the LSA of cylinder is 1188² cm.

TSA=2πr(r+h)

= 2×22/7×10.5×(10.5+18)

= 2×22/7×10.5×28.5

= 1881 cm²

Hence, the TSA of cylinder is 1881cm².

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Answer 2

Given :-

radius of cylinder = 10.5 cm

height of cylinder = 18 cm

Need to find :-

• Linear Surface Area
• Total Surface Area

Procedure :-

• Linear Surface Area ( LSA )

=> LSA = 2πrh

=> LSA = 2 × 22/7 × 10.5 × 18

=> LSA = 188 cm²

• Total Surface Area ( TSA )

=> TSA = 2πrh + 2πr²

=> TSA = (2 × 22/7 × 10.5 × 18) + 2 × 22/7 × 10.5 × 10.5

=> TSA = 1188 + 693

=> TSA = 1881 cm²

Conclusion :-

• LSA of cylinder is 1188 cm²
• TSA of cylinder is 1881 cm²