Area And Volume - 3D Test

Result

Area And Volume - 3D Test - 4

Score
-
out of -
Rank
-
out of -

TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

The floor of a swimming pool (size: 48 m x 24 m) is to be covered by using the tiles of size 8 cm x 12 cm. Depth of the pool at the shallow end is 1m and at the deep end is 21 m. How many pieces of tiles are required to cover the floor completely? (Assume that there is no wastage)

A
100,000

B
120,000

C
130,000

D
150,000
Question 2
1 / -0

The slant height of a cone is increased by k%. If radius remains same, the curved surface area increases by

A
k%

B
P²%

C
2P%

D
none of these
Question 3
1 / -0

Water flows at a rate of 10 m per minute from a cylindrical pipe, 5 mm in diameter. How long will it take to fill up a conical vessel whose diameter of the base is 40 cm and depth is 24 cm?

A
48 min 15 sec

B
51 min 12 sec

C
52 min 1 sec

D
55 min

Solution

Volume of the conical vessel = (1/3) × π × (20)² × 24 = 3200π cm³
Volume flown in 1 minute = (π × (2.5/10)² × 1000) = 62.5π cm³
Therefore, time taken = 3200π/62.5π = 51 min 12 sec