green with
19. An engineen plans to make all the pillars of the
Metro
with plants to make these beautiful and
to contribute for healthy enfronment as shown in the
picture. Observe the picture and answer the questions
f dimension of one pillar is 1.5mx 1.5m x 20m.
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Answer:
Step-by-step explanation:
(i) The shape of the pillars is
a) Rectangle b) Cube c) Cuboid d) Cylinder
= Cuboid
(ii) By using which formula he can calculate the surface area of the pillar?
= 2( lh +bh) = 2( l+ b) h
(iii) The lateral surface area of one pillar is
a) 100 m2 b) 120 m2 c) 165 m2 d) 82.5 m2
= 2( l+ b) h
= 2 (1.5 + 1.5 ) × 20
= 2(3×20)
= 2 (60)
= 120 m²
(iv) How much cement is used to fill the pillar?
a) 44 m3 b) 45 m3 c) 450 m3
d) 440 m3
= Volume of cuboid
= l × b × h
= 1.5m x 1.5m x 20m.
= 45 m³
(v) Find the cost of the plantation if it costs Rs.50 per m2
.
a) Rs.6225 b) Rs. 6000 c) Rs. 5000 d) Rs. 4100
20.
= Cost of plantation
total surface area = 120 m²
= 50 × 120
= Rs. 6000
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