" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Verified answer
1.]Rumus : 1³ + 2³ + 3³ + ... + n³ = (1 + 2 + 3 + ... + n)²
Maka
1³ + 2³ + 3³ + ... + 25³ = (1 + 2 + 3 + ... + 25)²
= ( ²⁵/₂ (1 + 25) )²
=( ²⁵/₂ × 26 )²
= (325)²
= 105625
2.]
Debit = 0,25 ltr / 1 detik
Maka Debit utk
a. 0,4 menit = 0,4 × 60 = 24 detik
Debit = (0,25 × 24) / 24 = 6 ltr / 24 dtk
b. 0,7 menit = 0,7 × 60 = 42 detik
Debit = (0,25 × 42) / 42 = 10,5 ltr / 42 dtk
c. 0,9 menit = 0,9 × 60 = 54 detik
Debit = (0,25 × 54) / 54 = 13,5 ltr / 54 dtk
d. 1,5 menit = 1,5 × 60 = 90 dtk
Debit = (0,25 × 90) / 90 = 22,5 ltr / 90 dtk
e. 3 menit = 180 dtk
Debit = (0,25 × 180) / 180 = 45 ltr / 180 dtk