a magician gives jack the seed of a magic bean plant he plants the seed and records the plants increase in height in decimeteres every day he finds that the plant growth follows an interesting mathematical pattern
on the day 1 the plants height increase by 1 dm
on the day 2 the plants height increase by 2 dm
on day 3 the plants height increases by 3 dm
on the day 4 the plants height increase by 4 dm
based on this pattern the height of the plant at the end of the nineth day will be
Answers
Given : plant growth follows an interesting mathematical pattern
on the day 1 the plants height increase by 1 dm
on the day 2 the plants height increase by 2 dm
on day 3 the plants height increases by 3 dm
on the day 4 the plants height increase by 4 dm
To find : based on this pattern the height of the plant at the end of the ninth day will be
Solution:
Plant height increase
Day 1 = 1
Day 2 = 2
Day 3 = 3
Day 9 = 9
This is an AP with first term = 1 ,
last term = 9
number of term = 9
Sum = (9/2)(1 + 9) = 45
Hence the height of the plant at the end of the ninth day will be 45 dm
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Answer:
the answer is (b)
Step-by-step explanation:
A Magician gives jack the seed of a magic bean plant= 1
decimeter= 1/10 of meter
so if the magician gave jack 2 seed = 1/10 x2
therefore the answer is (b)