Q1. How many strings of length 2.15 m can be cut from a string of 118.25 m? Q2. A girl threw a marble 15 m vertically up in the air which later fell and settled at the bottom of a lake 7 m deep. Find the total distance traveled by the marble while falling down?
Answers
Given,
Length of the whole string = 118.25 metres
Length of one smaller piece of string = 2.15 metres
To find,
The number of smaller length of strings that can be cut from the whole length of string.
Solution,
To find the number of small strings,we have to apply the following mathematical formula
= Total string length/ Length of smaller string
= 118.25/2.15
= 55
Hence,55 smaller strings can be cut from the whole string.
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Given,
Upward distance travelled by the marble = 15 metres
Depth of the lake = 7 metres
To find,
Total distance covered by that marble.
Solution,
Total distance = Upward travelling distance + Downward travelling distance + Depth of lake
= 15+15+7
= 37 metres
(The marble travelled the same distance ie. 15 metres, in the downward direction before entering the lake.)
Hence,the marble travelled a total of 37 metres.