Question

Directions for questions (1) to (3): Answer the questions on the basis of the information given below
Luta Raug band members are late for a concert in the evening. On their way, they come across a cracked bridge which
has no lighting. The bridge is strong enough to hold at most two of them, and they have only one torch with them. Andy
can get across the bridge in 2 min, Mandy takes 3 min, Sandy takes 6 min, but Kandy takes 9 min. Two band members
together can move only as fast as the slower between the two, and one band member must be carrying the torch during
the crossing. The band crosses the bridge in such a manner that the total time taken is minimum

(1) What is the time taken to cross the bridge?
a) 21 min
b) 20 min c) 22 min

d) 23 min

e) 24 min

(2) Who are the last two persons to move across the bridge?
a) Andy, Kandy b) Aandy, Mandy c) Kandy, Sandy

d) Kandy, Mandy

e) None of these

e) More than 4

(3) How many ways are there such that all can cross the bridge in minimum time?
a) 1 c) 3 d) 4​

Answer 1

Answer:

(A)24

(b)kandy and mandy

(c)3