Practice30 Create account

A tank open at the top has radius 7 m and depth 10 m. How much metal sheet is needed for its side and bottom? (Take π = $\frac{22}{7} .$ )

Class 8Surface Area of a CylinderMensuration

A748 sq m
B440 sq m
C594 sq m
D1540 sq m

Step-by-Step Solution

Side = 2πrh

= 2 \times \frac{22}{7} \times 7 \times 10 = 440

; bottom = π

r^{2} = 154

. Total = 594 sq m. 748 wrongly includes a lid.

Answer: C) 594 sq m

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Surface Area of a Cylinder practice questions

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…A sheet of tin 44 cm long and 20 cm wide is bent so that the 44 cm edge goes once round…Cylinder A has radius 7 cm and height 10 cm. Cylinder B has radius 10 cm and height 7…The net of a closed cylinder is shown: a rectangle with two circles. What is the total…Ravi finds the total surface area of a cylinder with r = 7 cm and h = 3 cm as 132 + 154…