Kabir makes a pen holder (open at the top) from cardboard. It is a cylinder of radius 3.5 cm and height 10 cm. How much cardboard does he need? (Take π = 22/7.)

Question

Accepted Answer

258.5 sq cm. Side = 2 × 22/7 × 3.5 × 10 = 220; base = 22/7 × 3.5 × 3.5 = 38.5. Total = 258.5 sq cm. 297 counts a lid it doesn't have; 385 is the volume.

Kabir makes a pen holder (open at the top) from cardboard. It is a cylinder of radius 3.5 cm and height 10 cm. How much cardboard does he need? (Take π = $\frac{22}{7} .$ )

Step-by-Step Solution

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More Class 8 Surface Area of a Cylinder practice

Kabir makes a pen holder (open at the top) from cardboard. It is a cylinder of radius 3.5 cm and height 10 cm. How much cardboard does he need? (Take π = 722​.)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 8 Surface Area of a Cylinder practice

Kabir makes a pen holder (open at the top) from cardboard. It is a cylinder of radius 3.5 cm and height 10 cm. How much cardboard does he need? (Take π = $\frac{22}{7} .$ )