Question

(Practice Set 47
1. Find the total surface area of cubes having the following sides.
(1) 3 cm (ii) 5 cm (iii) 7.2 m (iv) 6.8 m (V) 5.5 m
d the total surface area of the cuboids of length, breadth and height as given below:
(i) 12 cm, 10 cm, 5 cm
(ii) 5 cm, 3.5 cm, 1.4 cm
(111) 2.5 cm, 2 m, 2.4 m
(iv) 8 m, 5 m, 3.5 m
3. A matchbox is 4 cm long, 2.5 cm broad and 1.5 cm in height. Its outer sides are to be
covered exactly with craft paper. How much paper will be required to do so ?
4. An open box of length 1.5 m, breadth 1 m, and height 1 m is to be made for use on a
trolley for carrying garden waste. How much sheet metal will be required to make this
box? The inside and outside surface of the box is to be painted with rust proof paint.
At a rate of 150 rupees per sqm, how much will it cost to paint the box?​

Answer 1

Answer:

1 a - 54

Step-by-step explanation:

TSA. 6a(a)

a=3

6×3×3

6×9

54