 
<translate> Abokai 4 suna gudanar da tseren relay 4 x 100. Maryamu ta fara gudu kuma ta ɗauki sau biyu fiye da Susan. Susan ta gudu ta biyu kuma ta dauki 10 seconds fiye da Jen. Jen ya gudu na uku kuma ya gama a cikin 30 seconds. Tiffany ta yi tseren karshe kuma ta gama a cikin dakika 7 kasa da Maryamu. Da yawa seconds ya dauki tawagar don gama tseren? Bari mu amsa mataki-mataki: <eng> 4 friends are running a 4 x 100 relay race. Mary ran first and took twice as long as Susan. Susan ran second and she took 10 seconds longer than Jen. Jen ran third and finished in 30 seconds. Tiffany ran the last leg and finished in 7 seconds less than Mary. How many seconds did it take the team to finish the race? Let's answer step by step: 