Practice30 Create account

A water tank open at the top is 5 $m$ long, 4 $m$ wide and 3 $m$ deep. Find the area of sheet metal needed to make it, in $m^{2}$ .

Competition practiceAreas & Volumes

A94
B74
C54
D64

Step-by-Step Solution

The tank has a base and four walls but no lid. Base =

5 \times 4 = 20 m^{2}

. Walls =

2 (5 + 4) \times 3 = 54 m^{2}

. Total

= 20 + 54 = 74 m^{2}

.

Answer: B) 74

Master this topic in 30 minutes a day.

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

Practice 5 Similar Questions Free →

All Areas & Volumes practice questions

More Areas & Volumes practice

A cylindrical vessel open at the top has radius 7 cm and height 10 cm. Find the area of…From each corner of a square sheet of side 20 cm, a square of side 4 cm is cut off, and…A hollow metal pipe is 21 cm long. Its outer diameter is 10 cm and its inner diameter is…A cylindrical tube open at both ends is 20 cm long. Its outer radius is 9 cm and its…Water flows through a pipe of internal diameter 7 cm at a speed of 4 metres per second…