G.
17. A roller 150 cm long has a diameter 70 cm. It is used to level the playground. It
takes 750 complete revolutions. Determine the cost of leveling the playground at the
rate of 75 paise per square meter.
(a) Shape of the roller is
spherical, cylindrical, conical, hemi-spherical
by Height of the roller is
80 cm, 70 cm, 150 cm, 220 cm.
(c) Which surface of the roller touches the ground
curved surface, base, top, both base and top.
(d) Radius of the roller in meter
140 cm, 75 cm, -35 m, 7m.
(eſ Area of the playground
2745 m", 2475 m2, 4275 m, 2754 m2
Answers
Answered by
22
Answer:Area of playground = 750 × CSA of roller
= 750 × 2 × 22÷7 × 35 × 150
= 750 × 33000
= 24750000 cm^2
= 2475 m^2
Cost of leveling = 2475 × 0.75
= Rs 1856.25
hope it helps u
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