Question

A 15 cm long candle is lit. It burns at the rate of 0.25 cm/min.
1) Write an equation to calculate the height, h, of the candle after t minutes.​

Answer 1

Answer:

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Class 10

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>>Surface Areas and Volumes

>>Conversion of Solid from One Shape to Another

>>Water flows at the rate of 10 m/min. thr

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Water flows at the rate of 10m/min. through a cylindrical pipe 5mm in diameter. How long in sec would it take to fill a conical vessel whose diameter at the base is 40cm and depth 24cm?

Medium

Solution

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Correct option is A)

We know that,Volume of cylindrical =πr

2

H

and Volume of cone=

3

1

π(r)

2

(h)

Volume of cylinder=π(

2

0.5

)

2

(1000)=196.25cu. cm/min

Volume of cone=

3

1

π(20)

2

(24)=10048cm

3

∴ Time taken is

196.25

10048

=51.2 min =3072 sec