Question

if a rectangular tank is 21 cm long, 13 cm wide and 18 cm high and contains water up to a height of 11 cm then volume of water in litres is:

Answer 1

Step-by-step explanation:

GIVEN :

length = 21cm

breadth = 13cm

height = 18cm.

TO FIND THE TOTAL SURFACE AREA :

T.S.A = 2(lb + bh + hl)

= 2(21×13 + 13×18 + 18×21)

= 2( 273 + 234 + 387)

= 2(885)

= 1770 cm^2.

\boxed{required \: answer = {1770cm}^{2} }

requiredanswer=1770cm ^2

HOPE SO IT HELPS

Answer 2

Volume of water = 3.003 liters

Step-by-step explanation:

Given: Rectangular tank of 21 cm long, 13 cm wide and 18 cm height. Contains water up to a height of 11 cm.

Find: Volume of water in liters.

Solution:

L = 21 cm = 0.21 m

B = 13 cm = 0.13 m

Height of water H = 11 cm = 0.11 m

Volume of a cuboid = (length × breadth × height) cubic units.

Volume of the water = L * B * H = 0.21 * 0.13 * 0.11 = 0.003003 = 3.003 * 10^-3 cubic meters.

We know that 1 cubic meters = 1000 liters = 10^3 liters.

So Volume of water = 3.003 * 10^-3 * 10^3 = 3.003 liters.