Question

A spider descends from the roof of a room at the rate of 2 cm per sec. If the descent starts 2 m below the roof , how long will it take to reach the floor of room, if the height of room is 12 m?

Answer 1

Answer:

51 min!

I hope this helps!!

[ (total height-climb height)/(climb height-slip height) ]*(time to climb and slip minutes)+1

{Formula works for all similar questions}

here

total height=80

1 climb height=5

1 slip height=2

time to climb and slip minutes=time taken for 1 consecutive climb and slip=2 min

i.e; 1 minute to climb and another 1 minute to slip=2min

Note1:If slip is also in same minute then=1 min

“+1″ as last step.

So,

[(80–5)/(5–2)]*2+1

[75/3]*2+1

[25]*2+1

50+1

51 min.

Note2:If u get in decimal value in brackets i.e; [(total height-climb height)/(climb height-slips height) ] then take next number into consideration!!

Step-by-step explanation:

hope it helps...

and please try to make it the brainliest answer...

Answer 2

Answer:

[ (total height-climb height)/(climb height-slip height) ]*(time to climb and slip minutes)+1

{Formula works for all similar questions}

here

63

total height=80

1 climb height=5

1 slip height=2

time to climb and slip minutes=time taken for 1 consecutive climb and slip-2 min

i.e; 1 minute to climb and another 1 minute toSo,

[(80-5)/(5-2)]*2+1

[75/3]*2+1

[25]*2+1

50+1

51 min.

Note2:If u get in decimal value in brackets i.e; [(total height-climb height)/(climb height-slips height) ] then take next number into consideration!!

Step-by-step explanation:

hope it helps...

and please try to make it the brainliest answer...

Step-by-step explanation:

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