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प्रश्न
Choose the correct answer of the following question:
The radii of the circular ends of a bucket of height 40 cm are 24 cm and 15 cm. The slant height (in cm) of the bucket is
विकल्प
41
43
49
51
उत्तर
We have,
Height of the bucket, h = 40 cm,
Radius of the upper end, R = 24 cm and
Radius of the upper end, r = 15 cm
Now,
The slant height, `l = sqrt(("R"- r)^2 + "h"^2)`
`= sqrt((24 - 15)^2+40^2)`
`= sqrt(9^2 + 40^2)`
`=sqrt(81 + 1600)`
`=sqrt(1681)`
= 41 cm
Hence, the correct answer is option (a).
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