Question

Activity-
(1)The length , breadth and hight of a brick are 21 cm,15cm, 7 cm. What is its volume?
(2)A cube of iron is of side 8 cm. What is its volume? 1 cubic centimeter of iron weighs 8 grams. What is the weight of this cube ?
(3)A truck is loaded with sand, 4 metre long, 2 metre wide and 1 metre high. The price of 1 cubic metre of sand is 1000 rupees. What is the price of this truck load ?

Answer 1

(1) length of the rectangular block $=21cm$
Breadth of the rectangular block $=15cm$
Height of the rectangular block $=7cm$
Volume of the rectangular block $=21\times 15\times 7=2205$ cu.cm
(2) All sides of the cube are equal
Volume $=8\times 8\times 8=512cu.cm$
Weight of this cube $=512\times 8=4096$ gram
(3) Ans: volume of sand $=4\times 2\times 1=8$ cu.m
Price of this truck load $=8\times 1000=8000$ rupees