Question

222
Mathematics for Class 8
a = 343 = 7 x 7x7 =
a = 7.
So, the length of each edge of the cube = 7 cm.
Total surface area of the cube = (6a?) sq units
= (6 x 7 x 7) cm = 294 cm ?
EXERCISE 20A
1. Find the volume, lateral surface area and the total surface area of the cuboid
dimensions are:
(i) length = 22 cm, breadth = 12 cm and height = 7.5 cm
(ii) length 15 m, breadth = 6 m and height = 9 dm
(iii) length = 24 m, breadth = 25 cm and height = 6 m
(iv) length = 48 cm, breadth = 6 dm and height = 1 m
2. The dimensions of a rectangular water tank are 2 m 75 cm by l m 80 cm by 1 m 40
many litres of water does it hold when filled to the brim?
3. A solid rectangular piece of iron measures 1.05 mx 70 cm x 1.5 cm. Find the weig
piece in kilograms if 1 cm of iron weighs 8 grams.
ordis 3750 m 2 Find the cost of covering it with Oravel to a
TO​

Answer 1

Answer:

Refer to the following attatchments