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A spider climbing 38m high wall. It climbs 5 metre every hour and falls 2metre. How many hours will it take to climb the wall? A)12 hrs B)13 hrs C)14 hrs D)11 hrs

A spider climbing 38m high wall. It climbs 5 metre every hour and falls 2metre. How many hours will it take to climb the wall?
A)12 hrs
B)13 hrs
C)14 hrs
D)11 hrs

Grade:10

1 Answers

Janani Rajesh Kumar
33 Points
one year ago
The answer is option (b) 12 hrs
Accordin to the information given in the question, the spider climbs 5m and drops down 2 m every hour. So there is a net movement of 3m by the spider. This sequence continues till the end of 11th hour, where the spider must have scaled 33m (3*11). In the twelfth hour, it would directly climb 5m and would  reach its destination without dropping 2m as 33+5 gives 38. 

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