Q1.To develop critical and analyzing skills amongst her children, maths
teacher showed her students a video of 3D objects and asked the
students to identify the 3D objects. One such video was of PWD
workers constructing road using road roller. The cylindrical road roller
made of iron was 1m long. Its inner diameter was 54cm and thickness of
the iron sheet rolled into the road roller is 9cm.
i) What is the outer radius of the road roller ?
a) 22cm
b) 44cm
c) 36cm
d) 11cm
ii) What is the outer curved surface area of the road roller ?
a) 1548π cm²
b) 220π cm²
c) 7200π cm²
d) 440π cm²
iii) If PWD workers constructed 1584 m² road in one day, find the
number of revolutions that the road roller made ?
a) 500
b) 1000
c) 700
d) 100
iv) Find the inner curved surface area of the road roller?
v) Find the total surface area of the road roller?
Answers
Answered by
0
Answer:
81x4 + 54.72 - 9x2 - 3x + 2 is divided by 3x + 2.
Answered by
0
Answer:
(i) 36 cm
(ii) 7200π cm²
(iii) 700
(iv) 16971.428 cm²
(v) 43164 cm²
Step-by-step explanation:
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