Question

There are 12 saplings to be planted in a straight line at an interval of 10 m between
two consecutive saplings. Jeremy can carry only one sapling at a time and he has to
come back to the original point to take the next sapling. He plants 12 saplings in this
manner, planting the first sapling at the original point. After planting all the saplings,
he comes back at the original point,
In the process, what is the total distance that Jeremy covers?
ETTE
Tent
0
0
0
1,080 m
1,120 m
1,260 m
1,320 m

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Answer 1

Answer:

20+40+60+80+100+120+140+160+180+200+210=1310

Explanation:let the original point be x

now 20m for 2nd sapling going and coming back.

40 for third

60 for fourth

and so on .

Answer 2

Hence Total distance covered by Jeremy = 1320 m

Explanation:

• For sapling 1 = No distance is covered.
• For sapling 2, distance covered = 10 m
• Return distance=10 m
• For sapling 3, distance covered =20 m
• Return distance=20 m and so on

Thus the distances covered for saplings can be represented as : 0,2(10), 2(20),...i.e. 0,20, 40,...

Therefore total distance covered by Jeremy for planting 12 saplings and coming back to original position = S 12

Total distance covered = 122 [2(0) + (12 − 1) 20 ]

Total distance covered = 6 (11)(20) = 1320 m