A lit can carry up to 8 persons. At the ground floor A, B, C whose weights are in increasing GP with
an average weight of 62 kg enter the lift. When the lift stops at 3rd floor E, F and G whose weights
are in an increasing AP enter the lift. The new average weight of people in the lift becomes 66 kg.
What is the weight of F?
Answers
Given : At the ground floor A, B, C whose weights are in increasing AP with an average weight of 62 kg enter the lift. When the lift stops at 3rd floor E, F and G whose weights are in an increasing AP enter the lift. The new average weight of people in the lift becomes 66 kg.
To Find : What is the weight of F?
Solution:
A , B , C weight in AP
a-d , a , a + d = 3a
average = a = 62
Weight of three = 3 * 62 = 186 kg
E, F and G weights are in an increasing AP
b- d , b , b + d
= 3b
Total weight = 186 + 3b
new average weight of people in the lift becomes 66 kg
Weight = 66 * 6 = 396 kg
186 + 3b = 396
=> 3b = 210
=> b = 70
Weight of F is 70 kg
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Answer:
Step-by-step explanation:
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