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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
2 years 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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