Question

Ram and Ravi were playing with a paper phone, frustums of which are attached to each other by 95 m long string. If both start
moving in opposite directions at a speed of 18 m/min and 20 m/min respectively, after how many minutes will both have to stop?​

Answer 1

2.5 min is your answer.......

Step By Step Explanation:

95/(20+18)

=>2.5 min

Answer 2

Concept

Time = Distance / speed

Given

Ram and Ravi were playing with a paper phone, the frustums of which were connected by a 95-meter-long string.

To find

We have to calculate the time when both stop if they moving in opposite directions at a speed of 18 m/min and 20 m/min respectively.

Solution

Ram and Ravi both moving in opposite directions at a speed of 18 m/min and 20 m/min so in that case both speed will get add to expand the string

then total speed 20+18 = 38 m/min

total time taken= 95/38

                          = 2.5 min

Hence in 2.5 min both will stop.