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Mihir Sharma

Dec 16, 2012

A cuboidal tank has a length of 30cm, a breadth of 20cm and a height of 20cm.The tank is placed on a horizontal table and it is three-quarters full of water. Find the area of the tank which is in contact with water.

Syeda

Answer.

Height of tank in contact with water=3/4*20=15cm

Area of four walls of tank in contact with water=2(l b)*h=2(30 20)*15=2*50*15=1500 sq. cm

Area of base of tank in contact with water=l*b=30*20=600 sq. cm

Therefore total area of tank in contact with water=(1500 600) sq. cm=2100 sq. cm

Height of tank in contact with water=3/4*20=15cm

Area of four walls of tank in contact with water=2(l b)*h=2(30 20)*15=2*50*15=1500 sq. cm

Area of base of tank in contact with water=l*b=30*20=600 sq. cm

Therefore total area of tank in contact with water=(1500 600) sq. cm=2100 sq. cm

Shagufta

Height of tank in contact with water=3/4*20=15cmArea of four walls of tank in contact with water=2(l b)*h=2(30 20)*15=2*50*15=1500 sq. cmArea of base of tank in contact with water=l*b=30*20=600 sq. cmTherefore total area of tank in contact with water=(1500 600) sq. cm=2100 sq. cm

Kishore Kumar

Length (*l*), breadth (*b*) and height (*h*) of the cuboidal fish tank are 30 cm, 20 cm and 20 cm respectively.

The area of the tank which is in contact with water

= Area of base of the cuboidal fish tank

=*l *Ã—* b*

= 30 cm Ã— 20 cm

= 600 sq. cm

The area of the tank which is in contact with water

= Area of base of the cuboidal fish tank

=

= 30 cm Ã— 20 cm

= 600 sq. cm

Parthasaradhi M

Member since Apr 1, 2017

Solution:

Given dimensions of the cuboidal tank are

Length = 30 cm

Breadth = 20 cm

Height = 20 cm

It is given three quarters full of water. So height of the water filled becomes three quarters of the the height of the tank

Height of water filled in a tank = Â¾ x 20 = 15cm

Area of tank that contact with water = Area of Bottom surface + Area of four walls that are contacting with water

Given dimensions of the cuboidal tank are

Length = 30 cm

Breadth = 20 cm

Height = 20 cm

It is given three quarters full of water. So height of the water filled becomes three quarters of the the height of the tank

Height of water filled in a tank = Â¾ x 20 = 15cm

Area of tank that contact with water = Area of Bottom surface + Area of four walls that are contacting with water

= lb + 2lh + 2bh

= 30 x 20 + 2 x 30 x 15 + 2 x 20 x 15

= 600 + 900 + 600

= 2100 sq.cm

= 30 x 20 + 2 x 30 x 15 + 2 x 20 x 15

= 600 + 900 + 600

= 2100 sq.cm