Syntel Company Numerical Ability Time Distance and Speed

In Dubai city there are a number of skyscrapers. Grand Hotel building at Dubai was fitted with “Highrun” lifts. On the first day after fitting the lift there appeared a few technical issues.
The lift was moving 8 floors per minute initially and in the next minute it fell down by 3 floors. This process continued throughout that day. It took 65 minutes for the lift to reach top most floor for the first time and then it stopped there. How many floors are there in that building.

a) 168 b)178 c)160 d)184

Read Solution (Total 2)

its simple

a) 168

The lift covers 5 floors in 2 minutes. (since it is given the lift was moving 8 floors per minute initially and in the next minute it fell down by 3 floors)
In 64 minutes it will cover 5 x 32 = 160 floors.
In the 65 the minute it will go 8 floor up and stay there on top.
That means totally there are 160+8 = 168 floors.
10 years agoHelpfull: Yes(6) No(0)

since both the trains are moving in same direction with the speed of 2 km/hr and they are 8 km far away from each other. this means after exactly 2 hours they will collide each other which implies bird has flown for 2 hrs. now the speed of the bird is 6 km/hr in 2 hrs it will travel 12 km. therefore the answer is 12km
10 years agoHelpfull: Yes(0) No(1)

Syntel Other Question

Two trains traveling towards each other at 2kmph each are 8km apart. A bird starts at the front of one train and flies towards the other at a speed of 6kmph and on reaching the other train, it flies back towards the first train and repeats. What would be the distance travelled by the bird before the trains finally collide? A roadside magician/tricks -player in Jalpaiguri (West Bengal) demonstrates his skill of climbing up a pole fitted on the ground. He performs this feat before the audience who encourage him sufficiently. It was observed that in the first minute he takes 15 seconds to climb one metre. After that in the next minute he shows the public that he climbs down. For that he takes 20 seconds to climb down. He repeats this process of climbing up for the first minute and climbing down in the next minute. After how many minutes will he reach the top of a pole of 42 metre height and decides to stay there and show public?

a) 77 min b) 84 min c) 79 min d) cannot be ascertained.