RRB Assistant Loco Pilot and Technician Model Paper 3 with solutions

Question : 11 of 100

Marks: +1, -0

If the number of square centimetres on the surface area of a sphere is three times the number of cubic centimetres in its volume, then what is its diameter?

1 cm
2 cm
3 cm
6 cm

Validate

Solution:

(b) According to question,
Surface area of sphere = 3 (Volume of sphere)
⇒ 4π

r^2

= 3 ×

4/3πr^2

⇒ r = 1
∴ Diameter = 2r = 2 cm

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