Question

319. The growth of a medicinal plant of height 1 metre,
is 1 cm/day and it is growing straight vertically
upward. A man cuts 6 cm from the top, at a regular
interval of every 11 days. Its height will be 2 metres
after
(I.A.M., 2007)
(a) 220 days
(b) 250 days
(c) 275 days
(d) None of these​

Answer 1

Answer:

None of these is your answer

Answer 2

Medicinal plant height will be 2 meters after 208 days and option (d)is correct.

Step-by-step explanation:

Given:

A medicinal plant of height 1 meter.

The growth of a medicinal plant is  1 cm/day.

A man cuts 6 cm from the top, at a regular interval of every 11 days.

To Find:

Medicinal plant height will be 2 meters after how many days.

Solution:

As given,a medicinal plant of height 1 meter.

A medicinal plant of height = 1 meter.

New height of medicinal plant= 2 meter

Growth =2-1   =1 meter   =100 cm.

As given, the growth of a medicinal plant is  1 cm/day.

The growth of a medicinal plant = 1 cm/day.

As given,A man cuts 6 cm from the top, at a regular interval of every 11 days.

Growth in 11 days $=11\times1 -6$

                             $=11-6=5\ cm$

 It means   Growth in 11 days $= 5\ cm$

                   $Growth\ in\ 11\times 18 \ days =5\times18\ cm$

                    $Growth\ in\ 198 \ days =90cm$

            $Growth\ in\ (198 +10)\ days =(90+10)cm$

                       $Growth\ in\ 208\ days =100cm$

It means, 100 cm growth  will be 208 days.

                 1 meter growth  will be 208 days.

Therefore,Medicinal plant height will be 2 meters after 208 days.

Thus, medicinal plant height will be 2 meters after 208 days and option (d)is correct.

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