15kwintal+250ons-3/4ton=......kg Tolong y..sm no.17

1) 15 kwintal + 250 ons + 3/4 ton
= 1500 kg + 25 kg - 750 kg
= 775 kg

2) d = 28 cm
phi = 22/7
L = .....?
Jawab:
L = 1/4 phi . d kuadrat
L = 1/4 . 22/7 . 28 . 28
L = 22 . 4 . 28 / 4
L = 88 . 7
L = 616 cm kuadrat