AnSWErS to tHE StudEnt'S Book ExErCiSES - Hodder Plus Home

7 163.4 cm (1 d.p.)8 14.8 cm (1 d.p.)9 28.9 cm (1 d.p.)10 22.9 m (1 d.p.)11 9.1 m (1 d.p.)12 3.86 m (2 d.p.)Exercise 31.2 (page 410)These answers have been calculated using the pbutton on a calculator.1 a) 616 cm 2 (nearest whole number)b) 2463 cm 2 (nearest whole number)c) 20 106 cm 2 (nearest whole number)d) 3848 mm 2 (nearest whole number)e) 12 076 mm 2 (nearest whole number)f) 5809 cm 2 (nearest whole number)g) 9503 cm 2 (nearest whole number)h) 75.4 cm 2 (1 d.p.)i) 295.6 cm 2 (1 d.p.)j) 36.3 m 2 (1 d.p.)k) 21.2 m 2 (1 d.p.)l) 4.91 m 2 (2 d.p.)2 a) 201 cm 2 (nearest whole number)b) 452 cm 2 (nearest whole number)c) 3848 cm 2 (nearest whole number)d) 1018 mm 2 (nearest whole number)e) 5281 mm 2 (nearest whole number)f) 1810 cm 2 (nearest whole number)g) 2290 cm 2 (nearest whole number)h) 15.2 cm 2 (1 d.p.)i) 75.4 cm 2 (1 d.p.)j) 11.3 m 2 (1 d.p.)k) 6.2 m 2 (1 d.p.)l) 4.30 m 2 (2 d.p.)Exercise 31.3 (page 412)1 160 cm 22 126 cm 23 340 cm 24 227 cm 25 108 cm 26 212 cm 2Exercise 31.4 (page 414)1 a) 515 cm 3 b) 1376 cm 3c) 219.6 cm 3 d) 385.5 cm 3e) 192 cm 3 f) 780 cm 32 18 000 cm 3Exercise 31.5 (page 416)1 a) 1233 cm 3 b) 17 334 cm 3c) 2092.8 cm 3 d) 396.8 cm 3e) 2253.42 cm 3 f) 528.82 cm 32 119 000 mm 3Exercise 31.6 (page 418)These answers have been calculated using the pbutton on a calculator.1 a) 7037 cm 3 (nearest whole number)b) 25 862 cm 3 (nearest whole number)c) 113 097 cm 3 (nearest whole number)d) 24 881 mm 3 (nearest whole number)e) 11 781 mm 3 (nearest whole number)f) 115 mm 3 (nearest whole number)g) 707 m 3 (nearest whole number)h) 370 m 3 (nearest whole number)2 11 045 cm 3 (nearest whole number)Exercise 31.7 (page 420)These answers have been calculated using the pbutton on a calculator.1 a) 1810 cm 2 (nearest whole number)b) 2281 cm 2 (nearest whole number)c) 2827 cm 2 (nearest whole number)d) 3958 mm 2 (nearest whole number)e) 377 mm 2 (nearest whole number)f) 465.6 mm 2 (1 d.p.)g) 131.9 m 2 (1 d.p.)h) 77.0 m 2 (1 d.p.)2 152 cm 2 (nearest whole number)3 a) 2111 cm 2 (nearest whole number)b) 6993 cm 2 (nearest whole number)c) 10 336 cm 2 (nearest whole number)d) 3054 mm 2 (nearest whole number)e) 4869 mm 2 (nearest whole number)f) 1176.5 mm 2 (1 d.p.)g) 190.0 m 2 (1 d.p.)h) 59.7 m 2 (1 d.p.)Exercise 31.8 (page 424)1 PlanFront elevationSide elevation2 PlanFront elevationSide elevationHigher WJEC GCSE Mathematics © 2010, Hodder EducationAnswers to the Student’s Book exercises 227