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Mathematics · 2022 · 4 marks
CBSE 2022 · Region 1 · Set 2 · Q12
From a solid cylinder of height $\displaystyle 30$ cm and radius $\displaystyle 7$ cm, a conical cavity of height $\displaystyle 24$ cm and same radius is hollowed out. Find the total surface area of the remaining solid.Water in a canal, $\displaystyle 8$ m wide and $\displaystyle 6$ m deep, is flowing with a speed of $\displaystyle 12$ km/hour. How much area will it irrigate in one hour, if $\displaystyle 0.05$ m of standing water is required ? Case Study - $\displaystyle 1$
From a solid cylinder of height $\displaystyle 30$ cm and radius $\displaystyle 7$ cm, a conical cavity of height $\displaystyle 24$ cm and same radius is hollowed out. Find the total surface area of the remaining solid.
Water in a canal, $\displaystyle 8$ m wide and $\displaystyle 6$ m deep, is flowing with a speed of $\displaystyle 12$ km/hour. How much area will it irrigate in one hour, if $\displaystyle 0.05$ m of standing water is required ? Case Study - $\displaystyle 1$
Marking-scheme solution
$\displaystyle l=\sqrt{576+49}=25 \mathrm{~cm}$
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CBSE Class 10 Mathematics past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.